ࡱ> { Tbjbjzz *q)        8XTt e2"  $)$)$)$))))`1b1b1b1b1b1b1$4971 )))))1  $)$)2,,,)F $) $)`1,)`1,,$0$1$) CBE*0L1520e2 17+74$17 $1()),)))))11,)))e2))))7))))))))) : CHAPTER 2: Describing Motion: Kinematics in One Dimension Questions 1. Does a car speedometer measure speed, velocity, or both? A car speedometer measures only speed. It does not give any information about the direction, and so does not measure velocity 2. Can an object have a varying speed if its velocity is constant? If yes, give examples. 3. When an object moves with constant velocity, does its average velocity during any time interval differ from its instantaneous velocity at any instant? 4. In drag racing, is it possible for the car with the greatest speed crossing the finish line to lose the race? Explain. 5. If one object has a greater speed than a second object, does the first necessarily have a greater acceleration? Explain, using examples. 6. Compare the acceleration of a motorcycle that accelerates from  EMBED Equation.3  to  EMBED Equation.3  with the acceleration of a bicycle that accelerates from rest to  EMBED Equation.3  in the same time. 7. Can an object have a northward velocity and a southward acceleration? Explain. 8. Can the velocity of an object be negative when its acceleration is positive? What about vice versa? 9. Give an example where both the velocity and acceleration are negative. 10. Two cars emerge side by side from a tunnel. Car A is traveling with a speed of  EMBED Equation.3  and has an acceleration of  EMBED Equation.3  Car B has a speed of  EMBED Equation.3  and has an acceleration of  EMBED Equation.3  Which car is passing the other as they come out of the tunnel? Explain your reasoning. 11. Can an object be increasing in speed as its acceleration decreases? If so, give an example. If not, explain. 12. A baseball player hits a foul ball straight up into the air. It leaves the bat with a speed of  EMBED Equation.3  In the absence of air resistance, how fast will the ball be traveling when the catcher catches it? 13. As a freely falling object speeds up, what is happening to its acceleration due to gravity does it increase, decrease, or stay the same? 14. How would you estimate the maximum height you could throw a ball vertically upward? How would you estimate the maximum speed you could give it? 15. You travel from point A to point B in a car moving at a constant speed of  EMBED Equation.3  Then you travel the same distance from point B to another point C, moving at a constant speed of  EMBED Equation.3  Is your average speed for the entire trip from A to C  EMBED Equation.3  Explain why or why not. 16. In a lecture demonstration, a 3.0-m-long vertical string with ten bolts tied to it at equal intervals is dropped from the ceiling of the lecture hall. The string falls on a tin plate, and the class hears the clink of each bolt as it hits the plate. The sounds will not occur at equal time intervals. Why? Will the time between clinks increase or decrease near the end of the fall? How could the bolts be tied so that the clinks occur at equal intervals? 17. Which one of these motions is not at constant acceleration: a rock falling from a cliff, an elevator moving from the second floor to the fifth floor making stops along the way, a dish resting on a table? 18. An object that is thrown vertically upward will return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, will this result be altered, and if so, how? [Hint: The acceleration due to air resistance is always in a direction opposite to the motion.] 19. Can an object have zero velocity and nonzero acceleration at the same time? Give examples. 20. Can an object have zero acceleration and nonzero velocity at the same time? Give examples. *21. Describe in words the motion plotted in Fig. 228 in terms of v, a, etc. [Hint: First try to duplicate the motion plotted by walking or moving your hand.] *22. Describe in words the motion of the object graphed in Fig. 229. Problems [The Problems at the end of each Chapter are ranked I, II, or III according to estimated difficulty, with (I) Problems being easiest. Level III are meant as challenges for the best students. The Problems are arranged by Section, meaning that the reader should have read up to and including that Section, but not only that Section Problems often depend on earlier material. Finally, there is a set of unranked General Problems not arranged by Section number.] 21 to 23 Speed and Velocity 1. (I) What must be your car s average speed in order to travel 235 km in 3.25 h? 2. (I) A bird can fly  EMBED Equation.3  How long does it take to fly 15 km? 3. (I) If you are driving  EMBED Equation.3  along a straight road and you look to the side for 2.0 s, how far do you travel during this inattentive period? 4. (I) Convert  EMBED Equation.3  to (a)  EMBED Equation.3  (b)  EMBED Equation.3  and (c)  EMBED Equation.3  5. (I) A rolling ball moves from  EMBED Equation.3  to  EMBED Equation.3  during the time from  EMBED Equation.3  to  EMBED Equation.3  What is its average velocity? 6. (II) A particle at  EMBED Equation.3  is at  EMBED Equation.3  and at  EMBED Equation.3  is at  EMBED Equation.3  What is its average velocity? Can you calculate its average speed from these data? 7. (II) You are driving home from school steadily at  EMBED Equation.3  for 130 km. It then begins to rain and you slow to  EMBED Equation.3  You arrive home after driving 3 hours and 20 minutes. (a) How far is your hometown from school? (b) What was your average speed? 8. (II) According to a rule-of-thumb, every five seconds between a lightning flash and the following thunder gives the distance to the flash in miles. Assuming that the flash of light arrives in essentially no time at all, estimate the speed of sound in  EMBED Equation.3  from this rule. 9. (II) A person jogs eight complete laps around a quarter-mile track in a total time of 12.5 min. Calculate (a) the average speed and (b) the average velocity, in  EMBED Equation.3  10. (II) A horse canters away from its trainer in a straight line, moving 116 m away in 14.0 s. It then turns abruptly and gallops halfway back in 4.8 s. Calculate (a) its average speed and (b) its average velocity for the entire trip, using away from the trainer as the positive direction. 11. (II) Two locomotives approach each other on parallel tracks. Each has a speed of  EMBED Equation.3  with respect to the ground. If they are initially 8.5 km apart, how long will it be before they reach each other? (See Fig. 230). 12. (II) A car traveling  EMBED Equation.3  is 110 m behind a truck traveling  EMBED Equation.3  How long will it take the car to reach the truck? 13. (II) An airplane travels 3100 km at a speed of  EMBED Equation.3  and then encounters a tailwind that boosts its speed to  EMBED Equation.3  for the next 2800 km. What was the total time for the trip? What was the average speed of the plane for this trip? [Hint: Think carefully before using Eq. 211d.] 14. (II) Calculate the average speed and average velocity of a complete round-trip in which the outgoing 250 km is covered at  EMBED Equation.3  followed by a 1.0-hour lunch break, and the return 250 km is covered at  EMBED Equation.3  15. (III) A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowler hears the sound of the ball hitting the pins 2.50 s after the ball is released from his hands. What is the speed of the ball? The speed of sound is  EMBED Equation.3  24 Acceleration 16. (I) A sports car accelerates from rest to  EMBED Equation.3  in 6.2 s. What is its average acceleration in  EMBED Equation.3  17. (I) A sprinter accelerates from rest to  EMBED Equation.3  in 1.35 s. What is her acceleration (a) in  EMBED Equation.3  and (b) in  EMBED Equation.3  18. (II) At highway speeds, a particular automobile is capable of an acceleration of about  EMBED Equation.3  At this rate, how long does it take to accelerate from  EMBED Equation.3  to  EMBED Equation.3  19. (II) A sports car moving at constant speed travels 110 m in 5.0 s. If it then brakes and comes to a stop in 4.0 s, what is its acceleration in  EMBED Equation.3  Express the answer in terms of gs, where  EMBED Equation.3  20. (III) The position of a racing car, which starts from rest at  EMBED Equation.3  and moves in a straight line, is given as a function of time in the following Table. Estimate (a) its velocity and (b) its acceleration as a function of time. Display each in a Table and on a graph. t (s)00.250.500.751.001.502.002.50x (m)00.110.461.061.944.628.5513.79t (s)3.003.504.004.505.005.506.00x (m)20.3628.3137.6548.3760.3073.2687.1625 and 26 Motion at Constant Acceleration 21. (I) A car accelerates from  EMBED Equation.3  to  EMBED Equation.3  in 6.0 s. What was its acceleration? How far did it travel in this time? Assume constant acceleration. 22. (I) A car slows down from  EMBED Equation.3  to rest in a distance of 85 m. What was its acceleration, assumed constant? 23. (I) A light plane must reach a speed of  EMBED Equation.3  for takeoff. How long a runway is needed if the (constant) acceleration is  EMBED Equation.3  24. (II) A world-class sprinter can burst out of the blocks to essentially top speed (of about  EMBED Equation.3 ) in the first 15.0 m of the race. What is the average acceleration of this sprinter, and how long does it take her to reach that speed? 25. (II) A car slows down uniformly from a speed of  EMBED Equation.3  to rest in 6.00 s. How far did it travel in that time? 26. (II) In coming to a stop, a car leaves skid marks 92 m long on the highway. Assuming a deceleration of  EMBED Equation.3  estimate the speed of the car just before braking. 27. (II) A car traveling  EMBED Equation.3  strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.80 m. What was the average acceleration of the driver during the collision? Express the answer in terms of gs, where  EMBED Equation.3  28. (II) Determine the stopping distances for a car with an initial speed of  EMBED Equation.3  and human reaction time of 1.0 s, for an acceleration (a)  EMBED Equation.3  (b)  EMBED Equation.3  29. (III) Show that the equation for the stopping distance of a car is  EMBED Equation.3  where  EMBED Equation.3  is the initial speed of the car,  EMBED Equation.3  is the drivers reaction time, and a is the constant acceleration (and is negative). 30. (III) A car is behind a truck going  EMBED Equation.3  on the highway. The cars driver looks for an opportunity to pass, guessing that his car can accelerate at  EMBED Equation.3  He gauges that he has to cover the 20-m length of the truck, plus 10 m clear room at the rear of the truck and 10 m more at the front of it. In the oncoming lane, he sees a car approaching, probably also traveling at  EMBED Equation.3  He estimates that the car is about 400 m away. Should he attempt the pass? Give details. 31. (III) A runner hopes to complete the 10,000-m run in less than 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The runner must then accelerate at  EMBED Equation.3  for how many seconds in order to achieve the desired time? 32. (III) A person driving her car at  EMBED Equation.3  approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning red, and she is 28 m away from the near side of the intersection (Fig. 231). Should she try to stop, or should she speed up to cross the intersection before the light turns red? The intersection is 15 m wide. Her cars maximum deceleration is  EMBED Equation.3  whereas it can accelerate from  EMBED Equation.3  to  EMBED Equation.3  in 6.0 s. Ignore the length of her car and her reaction time. 27 Falling Objects [neglect air resistance] 33. (I) A stone is dropped from the top of a cliff. It hits the ground below after 3.25 s. How high is the cliff? 34. (I) If a car rolls gently  EMBED Equation.3  off a vertical cliff, how long does it take it to reach  EMBED Equation.3  35. (I) Estimate (a) how long it took King Kong to fall straight down from the top of the Empire State Building (380 m high), and (b) his velocity just before landing? 36. (II) A baseball is hit nearly straight up into the air with a speed of  EMBED Equation.3  (a) How high does it go? (b) How long is it in the air? 37. (II) A ballplayer catches a ball 3.0 s after throwing it vertically upward. With what speed did he throw it, and what height did it reach? 38. (II) An object starts from rest and falls under the influence of gravity. Draw graphs of (a) its speed and (b) the distance it has fallen, as a function of time from  EMBED Equation.3  to  EMBED Equation.3  Ignore air resistance. 39. (II) A helicopter is ascending vertically with a speed of  EMBED Equation.3  At a height of 125 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The packages initial speed equals the helicopters.] 40. (II) For an object falling freely from rest, show that the distance traveled during each successive second increases in the ratio of successive odd integers (1, 3, 5, etc.). This was first shown by Galileo. See Figs. 218 and 221. 41. (II) If air resistance is neglected, show (algebraically) that a ball thrown vertically upward with a speed  EMBED Equation.3  will have the same speed,  EMBED Equation.3  when it comes back down to the starting point. 42. (II) A stone is thrown vertically upward with a speed of  EMBED Equation.3  (a) How fast is it moving when it reaches a height of 11.0 m? (b) How long is required to reach this height? (c) Why are there two answers to (b)? 43. (III) Estimate the time between each photoflash of the apple in Fig. 218 (or number of photoflashes per second). Assume the apple is about 10 cm in diameter. [Hint: Use two apple positions, but not the unclear ones at the top.] 44. (III) A falling stone takes 0.28 s to travel past a window 2.2 m tall (Fig. 232). From what height above the top of the window did the stone fall? 45. (III) A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2 s later. If the speed of sound is  EMBED Equation.3  how high is the cliff? 46. (III) Suppose you adjust your garden hose nozzle for a hard stream of water. You point the nozzle vertically upward at a height of 1.5 m above the ground (Fig. 233). When you quickly move the nozzle away from the vertical, you hear the water striking the ground next to you for another 2.0 s. What is the water speed as it leaves the nozzle? 47. (III) A stone is thrown vertically upward with a speed of  EMBED Equation.3  from the edge of a cliff 70.0 m high (Fig. 234). (a) How much later does it reach the bottom of the cliff? (b) What is its speed just before hitting? (c) What total distance did it travel? 48. (III) A baseball is seen to pass upward by a window 28 m above the street with a vertical speed of  EMBED Equation.3  If the ball was thrown from the street, (a) what was its initial speed, (b) what altitude does it reach, (c) when was it thrown, and (d) when does it reach the street again? *2 8 Graphical Analysis *49. (I) Figure 2 29 shows the velocity of a train as a function of time. (a) At what time was its velocity greatest? (b) During what periods, if any, was the velocity constant? (c) During what periods, if any, was the acceleration constant? (d) When was the magnitude of the acceleration greatest? *50. (II) The position of a rabbit along a straight tunnel as a function of time is plotted in Fig. 228. What is its instantaneous velocity (a) at  EMBED Equation.3  and (b) at  EMBED Equation.3  What is its average velocity (c) between  EMBED Equation.3  and  EMBED Equation.3  (d) between  EMBED Equation.3  and  EMBED Equation.3  and (e) between  EMBED Equation.3  and  EMBED Equation.3  *51. (II) In Fig. 228, (a) during what time periods, if any, is the velocity constant? (b) At what time is the velocity greatest? (c) At what time, if any, is the velocity zero? (d) Does the object move in one direction or in both directions during the time shown? *52. (II) A certain type of automobile can accelerate approximately as shown in the velocitytime graph of Fig. 235. (The short flat spots in the curve represent shifting of the gears.) (a) Estimate the average acceleration of the car in second gear and in fourth gear. (b) Estimate how far the car traveled while in fourth gear. *53. (II) Estimate the average acceleration of the car in the previous Problem (Fig. 235) when it is in (a) first, (b) third, and (c) fifth gear. (d) What is its average acceleration through the first four gears? *54. (II) In Fig. 229, estimate the distance the object traveled during (a) the first minute, and (b) the second minute. *55. (II) Construct the  EMBED Equation.3  vs. t graph for the object whose displacement as a function of time is given by Fig. 228. *56. (II) Figure 236 is a position versus time graph for the motion of an object along the x axis. Consider the time interval from A to B. (a) Is the object moving in the positive or negative direction? (b) Is the object speeding up or slowing down? (c) Is the acceleration of the object positive or negative? Now consider the time interval from D to E. (d) Is the object moving in the positive or negative direction? (e) Is the object speeding up or slowing down? (f) Is the acceleration of the object positive or negative? (g) Finally, answer these same three questions for the time interval from C to D. General Problems 57. A person jumps from a fourth-story window 15.0 m above a firefighters safety net. The survivor stretches the net 1.0 m before coming to rest, Fig. 237. (a) What was the average deceleration experienced by the survivor when she was slowed to rest by the net? (b) What would you do to make it safer (that is, to generate a smaller deceleration): would you stiffen or loosen the net? Explain. 58. The acceleration due to gravity on the Moon is about one-sixth what it is on Earth. If an object is thrown vertically upward on the Moon, how many times higher will it go than it would on Earth, assuming the same initial velocity? 59. A person who is properly constrained by an over-the-shoulder seat belt has a good chance of surviving a car collision if the deceleration does not exceed about 30 gs  EMBED Equation.3  Assuming uniform deceleration of this value, calculate the distance over which the front end of the car must be designed to collapse if a crash brings the car to rest from  EMBED Equation.3  60. Agent Bond is standing on a bridge, 12 m above the road below, and his pursuers are getting too close for comfort. He spots a flatbed truck approaching at  EMBED Equation.3  which he measures by knowing that the telephone poles the truck is passing are 25 m apart in this country. The bed of the truck is 1.5 m above the road, and Bond quickly calculates how many poles away the truck should be when he jumps down from the bridge onto the truck to make his getaway. How many poles is it? 61. Suppose a car manufacturer tested its cars for front-end collisions by hauling them up on a crane and dropping them from a certain height. (a) Show that the speed just before a car hits the ground, after falling from rest a vertical distance H, is given by  EMBED Equation.3  What height corresponds to a collision at (b)  EMBED Equation.3  (c)  EMBED Equation.3  62. Every year the Earth travels about  EMBED Equation.3  as it orbits the Sun. What is Earths average speed in  EMBED Equation.3  63. A 95-m-long train begins uniform acceleration from rest. The front of the train has a speed of  EMBED Equation.3  when it passes a railway worker who is standing 180 m from where the front of the train started. What will be the speed of the last car as it passes the worker? (See Fig. 238.) 64. A person jumps off a diving board 4.0 m above the waters surface into a deep pool. The persons downward motion stops 2.0 m below the surface of the water. Estimate the average deceleration of the person while under the water. 65. In the design of a rapid transit system, it is necessary to balance the average speed of a train against the distance between stops. The more stops there are, the slower the trains average speed. To get an idea of this problem, calculate the time it takes a train to make a 9.0-km trip in two situations: (a) the stations at which the trains must stop are 1.8 km apart (a total of 6 stations, including those at ends); and (b) the stations are 3.0 km apart (4 stations total). Assume that at each station the train accelerates at a rate of  EMBED Equation.3  until it reaches  EMBED Equation.3  then stays at this speed until its brakes are applied for arrival at the next station, at which time it decelerates at  EMBED Equation.3  Assume it stops at each intermediate station for 20 s. 66. Pelicans tuck their wings and free fall straight down when diving for fish. Suppose a pelican starts its dive from a height of 16.0 m and cannot change its path once committed. If it takes a fish 0.20 s to perform evasive action, at what minimum height must it spot the pelican to escape? Assume the fish is at the surface of the water. 67. In putting, the force with which a golfer strikes a ball is planned so that the ball will stop within some small distance of the cup, say, 1.0 m long or short, in case the putt is missed. Accomplishing this from an uphill lie (that is, putting downhill, see Fig. 239) is more difficult than from a downhill lie. To see why, assume that on a particular green the ball decelerates constantly at  EMBED Equation.3  going downhill, and constantly at  EMBED Equation.3  going uphill. Suppose we have an uphill lie 7.0 m from the cup. Calculate the allowable range of initial velocities we may impart to the ball so that it stops in the range 1.0 m short to 1.0 m long of the cup. Do the same for a downhill lie 7.0 m from the cup. What in your results suggests that the downhill putt is more difficult? 68. A fugitive tries to hop on a freight train traveling at a constant speed of  EMBED Equation.3  Just as an empty box car passes him, the fugitive starts from rest and accelerates at  EMBED Equation.3  to his maximum speed of  EMBED Equation.3  (a) How long does it take him to catch up to the empty box car? (b) What is the distance traveled to reach the box car? 69. A stone is dropped from the roof of a high building. A second stone is dropped 1.50 s later. How far apart are the stones when the second one has reached a speed of  EMBED Equation.3  70. A race car driver must average  EMBED Equation.3  over the course of a time trial lasting ten laps. If the first nine laps were done at  EMBED Equation.3  what average speed must be maintained for the last lap? 71. A bicyclist in the Tour de France crests a mountain pass as he moves at  EMBED Equation.3  At the bottom, 4.0 km farther, his speed is  EMBED Equation.3  What was his average acceleration (in  EMBED Equation.3 ) while riding down the mountain? 72. Two children are playing on two trampolines. The first child can bounce up one-and-a-half times higher than the second child. The initial speed up of the second child is  EMBED Equation.3  (a) Find the maximum height the second child reaches. (b) What is the initial speed of the first child? (c) How long was the first child in the air? 73. An automobile traveling  EMBED Equation.3  overtakes a 1.10-km-long train traveling in the same direction on a track parallel to the road. If the trains speed is  EMBED Equation.3  how long does it take the car to pass it, and how far will the car have traveled in this time? See Fig. 240. What are the results if the car and train are traveling in opposite directions? 74. A baseball pitcher throws a baseball with a speed of  EMBED Equation.3  In throwing the baseball, the pitcher accelerates the ball through a displacement of about 3.5 m, from behind the body to the point where it is released (Fig. 241). Estimate the average acceleration of the ball during the throwing motion. 75. A rocket rises vertically, from rest, with an acceleration of  EMBED Equation.3  until it runs out of fuel at an altitude of 1200 m. After this point, its acceleration is that of gravity, downward. (a) What is the velocity of the rocket when it runs out of fuel? (b) How long does it take to reach this point? (c) What maximum altitude does the rocket reach? (d) How much time (total) does it take to reach maximum altitude? (e) With what velocity does the rocket strike the Earth? (f) How long (total) is it in the air? 76. Consider the street pattern shown in Fig. 242. Each intersection has a traffic signal, and the speed limit is  EMBED Equation.3  Suppose you are driving from the west at the speed limit. When you are 10 m from the first intersection, all the lights turn green. The lights are green for 13 s each. (a) Calculate the time needed to reach the third stoplight. Can you make it through all three lights without stopping? (b) Another car was stopped at the first light when all the lights turned green. It can accelerate at the rate of  EMBED Equation.3  to the speed limit. Can the second car make it through all three lights without stopping? 77. A police car at rest, passed by a speeder traveling at a constant  EMBED Equation.3  takes off in hot pursuit. The police officer catches up to the speeder in 750 m, maintaining a constant acceleration. (a) Qualitatively plot the position vs. time graph for both cars from the police cars start to the catch-up point. Calculate (b) how long it took the police officer to overtake the speeder, (c) the required police car acceleration, and (d) the speed of the police car at the overtaking point. 78. A stone is dropped from the roof of a building; 2.00 s after that, a second stone is thrown straight down with an initial speed of  EMBED Equation.3  and the two stones land at the same time. (a) How long did it take the first stone to reach the ground? (b) How high is the building? (c) What are the speeds of the two stones just before they hit the ground? 79. Two stones are thrown vertically up at the same time. The first stone is thrown with an initial velocity of  EMBED Equation.3  from a 12th-floor balcony of a building and hits the ground after 4.5 s. With what initial velocity should the second stone be thrown from a 4th-floor balcony so that it hits the ground at the same time as the first stone? Make simple assumptions, like equal-height floors. 80. If there were no air resistance, how long would it take a free-falling parachutist to fall from a plane at 3200 m to an altitude of 350 m, where she will pull her ripcord? What would her speed be at 350 m? (In reality, the air resistance will restrict her speed to perhaps  EMBED Equation.3 ) 81. A fast-food restaurant uses a conveyor belt to send the burgers through a grilling machine. If the grilling machine is 1.1 m long and the burgers require 2.5 min to cook, how fast must the conveyor belt travel? If the burgers are spaced 15 cm apart, what is the rate of burger production (in  EMBED Equation.3 )? 82. Bill can throw a ball vertically at a speed 1.5 times faster than Joe can. How many times higher will Bills ball go than Joes? 83. 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You drop a ball from rest and see that it takes 1.2 s for the ball to hit the ground below. Your friend then picks up the ball and throws it up to you, such that it just comes to rest in your hand. What is the speed with which your friend threw the ball? 84. Two students are asked to find the height of a particular building using a barometer. Instead of using the barometer as an altitude-measuring device, they take it to the roof of the building and drop it off, timing its fall. One student reports a fall time of 2.0 s, and the other, 2.3 s. How much difference does the 0.3 s make for the estimates of the buildings height? *85. Figure 243 shows the position vs. time graph for two bicycles, A and B. (a) Is there any instant at which the two bicycles have the same velocity? (b) Which bicycle has the larger acceleration? (c) At which instant(s) are the bicycles passing each other? Which bicycle is passing the other? (d) Which bicycle has the highest instantaneous velocity? (e) Which bicycle has the higher average velocity?     2005 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. This material is protected under all copyright laws as they currently exist. No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher. {*,-/023567PQRST,,$h]ha$$$1$^`a$*+-.01346PSThoyB*CJOJQJaJphhoyjhoyUhoy6CJKHhoyCJKH(/ =!"#$p% Dd ,J  C A? "2Z*j5$~"6Dg`!.*j5$~"x`\xcdd``$D@9@, fbd02,(1dbfazxERcgb qЈ@P5< %!  0b%EV2XL݌ f:v#L ! ~ Ay mS8Qf 8# ٹ0~,#H^.0 3`f``ÂI)$5&0h.3XJ3Dd ,J  C A? "2ZTdy6p@16<g`!.Tdy6p@1x`\xcdd``$D@9@, fbd02,(1dbfazxERcgb qЈ@P5< %!  0b%E1XL݌ f:v#L ! ~ Ay !02pi#.S pZFsa$F\ސ$oiu5g` n$#RpeqIj.L`\f:4CDd ,J  C A? "2Ymo QnGO/yM54g`!-mo QnGO/yMx(+x=P=jQfѸ .1IXhN`+Ab`5Ҥ+XY9fGn y<e"ql:U,dJV;jk|wmDeR )p6̿B\pCj(~ϯX:CNywJd# A7p%Sb_GxAz8mzpWfKY{v-4GhkAշtFH/`{ wE13}Dd ,J  C A? 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