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© 2015 Pearson Education, Inc.

QuickCheck 2.1 Here is a motion diagram of a car moving along a straight road: Which position-versus-time graph matches this motion diagram? Answer: E © 2015 Pearson Education, Inc. 2

QuickCheck 2.1 Here is a motion diagram of a car moving along a straight road: Which position-versus-time graph matches this motion diagram? Answer: E E. © 2015 Pearson Education, Inc. 3

QuickCheck 2.2 Here is a motion diagram of a car moving along a straight road: Which velocity-versus-time graph matches this motion diagram? None of the above. Answer: C © 2015 Pearson Education, Inc. 4

QuickCheck 2.2 Here is a motion diagram of a car moving along a straight road: Which velocity-versus-time graph matches this motion diagram? None of the above. Answer: C C. © 2015 Pearson Education, Inc. 5

QuickCheck 2.3 Here is a motion diagram of a car moving along a straight road: Which velocity-versus-time graph matches this motion diagram? Answer: D © 2015 Pearson Education, Inc. 6

QuickCheck 2.3 Here is a motion diagram of a car moving along a straight road: Which velocity-versus-time graph matches this motion diagram? D. © 2015 Pearson Education, Inc. 7

QuickCheck 2.4 A graph of position versus time for a basketball player moving down the court appears as follows: Which of the following velocity graphs matches the position graph? Answer: C A. B. C. D. © 2015 Pearson Education, Inc.

QuickCheck 2.4 A graph of position versus time for a basketball player moving down the court appears as follows: Which of the following velocity graphs matches the position graph? A. B. C. D. © 2015 Pearson Education, Inc.

QuickCheck 2.5 The slope at a point on a position-versus-time graph of an object is The object’s speed at that point. The object’s velocity at that point. The object’s acceleration at that point. The distance traveled by the object to that point. I am not sure. Answer: B © 2015 Pearson Education, Inc. 10

QuickCheck 2.5 The slope at a point on a position-versus-time graph of an object is The object’s speed at that point. The object’s velocity at that point. The object’s acceleration at that point. The distance traveled by the object to that point. I am not sure. © 2015 Pearson Education, Inc. 11

QuickCheck 2.6 A graph of velocity versus time for a hockey puck shot into a goal appears as follows: Which of the following position graphs matches the velocity graph? Answer: D A. B. C. D. © 2015 Pearson Education, Inc.

QuickCheck 2.6 A graph of velocity versus time for a hockey puck shot into a goal appears as follows: Which of the following position graphs matches the velocity graph? A. B. C. (d) D. © 2015 Pearson Education, Inc.

QuickCheck 2.7 Which velocity-versus-time graph goes with this position graph? Answer: C © 2015 Pearson Education, Inc. 14

QuickCheck 2.7 Which velocity-versus-time graph goes with this position graph? C. © 2015 Pearson Education, Inc. 15

QuickCheck 2.8 Here is a position graph of an object: At t = 1.5 s, the object’s velocity is 40 m/s 20 m/s 10 m/s –10 m/s None of the above Answer: B © 2015 Pearson Education, Inc. 16

QuickCheck 2.8 Here is a position graph of an object: At t = 1.5 s, the object’s velocity is 40 m/s 20 m/s 10 m/s –10 m/s None of the above © 2015 Pearson Education, Inc. 17

QuickCheck 2.9 When do objects 1 and 2 have the same velocity? At some instant before time t0 At time t0 At some instant after time t0 Both A and B Never Answer: A © 2015 Pearson Education, Inc. 18

QuickCheck 2.9 When do objects 1 and 2 have the same velocity? At some instant before time t0 At time t0 At some instant after time t0 Both A and B Never Same slope at this time © 2015 Pearson Education, Inc. 19

QuickCheck 2.10 Masses P and Q move with the position graphs shown. Do P and Q ever have the same velocity? If so, at what time or times? P and Q have the same velocity at 2 s. P and Q have the same velocity at 1 s and 3 s. P and Q have the same velocity at 1 s, 2 s, and 3 s. P and Q never have the same velocity. Answer: A © 2015 Pearson Education, Inc.

QuickCheck 2.10 Masses P and Q move with the position graphs shown. Do P and Q ever have the same velocity? If so, at what time or times? P and Q have the same velocity at 2 s. P and Q have the same velocity at 1 s and 3 s. P and Q have the same velocity at 1 s, 2 s, and 3 s. P and Q never have the same velocity. © 2015 Pearson Education, Inc.

QuickCheck 2.11 Here is the velocity graph of an object that is at the origin (x  0 m) at t  0 s. At t  4.0 s, the object’s position is 20 m 16 m 12 m 8 m 4 m Answer: C © 2015 Pearson Education, Inc. 22

QuickCheck 2.11 Here is the velocity graph of an object that is at the origin (x  0 m) at t  0 s. At t  4.0 s, the object’s position is 20 m 16 m 12 m 8 m 4 m Displacement  area under the curve © 2015 Pearson Education, Inc. 23

QuickCheck 2.12 A particle has velocity as it moves from point 1 to point 2. The acceleration is shown. What is its velocity vector as it moves away from point 2? Answer: B © 2015 Pearson Education, Inc.

QuickCheck 2.12 A particle has velocity as it moves from point 1 to point 2. The acceleration is shown. What is its velocity vector as it moves away from point 2? B. © 2015 Pearson Education, Inc.

QuickCheck 2.13 A car moves along a straight stretch of road. The following graph shows the car’s position as a function of time: At what point (or points) do the following conditions apply? The displacement is zero. The speed is zero. The speed is increasing. The speed is decreasing. © 2015 Pearson Education, Inc.

QuickCheck 2.13 A car moves along a straight stretch of road. The following graph shows the car’s position as a function of time: At what point (or points) do the following conditions apply? The displacement is zero. D The speed is zero. B, E The speed is increasing. C The speed is decreasing. A © 2015 Pearson Education, Inc.

QuickCheck 2.14 The motion diagram shows a particle that is slowing down. The sign of the position x and the sign of the velocity vx are: Position is positive, velocity is positive. Position is positive, velocity is negative. Position is negative, velocity is positive. Position is negative, velocity is negative. Answer: B © 2015 Pearson Education, Inc.

QuickCheck 2.14 The motion diagram shows a particle that is slowing down. The sign of the position x and the sign of the velocity vx are: Position is positive, velocity is positive. Position is positive, velocity is negative. Position is negative, velocity is positive. Position is negative, velocity is negative. © 2015 Pearson Education, Inc.

QuickCheck 2.15 The motion diagram shows a particle that is slowing down. The sign of the acceleration ax is: Acceleration is positive. Acceleration is negative. Answer: A © 2015 Pearson Education, Inc.

QuickCheck 2.15 The motion diagram shows a particle that is slowing down. The sign of the acceleration ax is: Acceleration is positive. Acceleration is negative. © 2015 Pearson Education, Inc.

QuickCheck 2.16 A cyclist riding at 20 mph sees a stop sign and actually comes to a complete stop in 4 s. He then, in 6 s, returns to a speed of 15 mph. Which is his motion diagram? Answer: B © 2015 Pearson Education, Inc.

QuickCheck 2.16 A cyclist riding at 20 mph sees a stop sign and actually comes to a complete stop in 4 s. He then, in 6 s, returns to a speed of 15 mph. Which is his motion diagram? B. © 2015 Pearson Education, Inc.

QuickCheck 2.17 These four motion diagrams show the motion of a particle along the x-axis. Which motion diagrams correspond to a positive acceleration? Which motion diagrams correspond to a negative acceleration? © 2015 Pearson Education, Inc.

QuickCheck 2.17 These four motion diagrams show the motion of a particle along the x-axis. Which motion diagrams correspond to a positive acceleration? Which motion diagrams correspond to a negative acceleration? Positive Negative Positive Negative © 2015 Pearson Education, Inc.

QuickCheck 2.18 Mike jumps out of a tree and lands on a trampoline. The trampoline sags 2 feet before launching Mike back into the air. At the very bottom, where the sag is the greatest, Mike’s acceleration is Upward. Downward. Zero. Answer: A © 2015 Pearson Education, Inc.

QuickCheck 2.18 Mike jumps out of a tree and lands on a trampoline. The trampoline sags 2 feet before launching Mike back into the air. At the very bottom, where the sag is the greatest, Mike’s acceleration is Upward. Downward. Zero. © 2015 Pearson Education, Inc.

QuickCheck 2.19 A cart slows down while moving away from the origin. What do the position and velocity graphs look like? Answer: D © 2015 Pearson Education, Inc.

QuickCheck 2.19 A cart slows down while moving away from the origin. What do the position and velocity graphs look like? D. © 2015 Pearson Education, Inc.

QuickCheck 2.20 A cart speeds up toward the origin. What do the position and velocity graphs look like? Answer: C © 2015 Pearson Education, Inc.

QuickCheck 2.20 A cart speeds up toward the origin. What do the position and velocity graphs look like? C. © 2015 Pearson Education, Inc.

QuickCheck 2.21 A cart speeds up while moving away from the origin. What do the velocity and acceleration graphs look like? Answer: B © 2015 Pearson Education, Inc.

QuickCheck 2.21 A cart speeds up while moving away from the origin. What do the velocity and acceleration graphs look like? B. © 2015 Pearson Education, Inc.

QuickCheck 2.22 Here is a motion diagram of a car speeding up on a straight road: The sign of the acceleration ax is Positive. Negative. Zero. Answer: B © 2015 Pearson Education, Inc.

QuickCheck 2.22 Here is a motion diagram of a car speeding up on a straight road: The sign of the acceleration ax is Positive. Negative. Zero. Speeding up means vx and ax have the same sign. © 2015 Pearson Education, Inc.

QuickCheck 2.23 A cart slows down while moving away from the origin. What do the velocity and acceleration graphs look like? Answer: C © 2015 Pearson Education, Inc.

QuickCheck 2.23 A cart slows down while moving away from the origin. What do the velocity and acceleration graphs look like? C. © 2015 Pearson Education, Inc.

QuickCheck 2.24 A cart speeds up while moving toward the origin. What do the velocity and acceleration graphs look like? Answer: C © 2015 Pearson Education, Inc.

QuickCheck 2.24 A cart speeds up while moving toward the origin. What do the velocity and acceleration graphs look like? C. © 2015 Pearson Education, Inc.

QuickCheck 2.25 Which velocity-versus-time graph goes with this acceleration graph? Answer: E © 2015 Pearson Education, Inc.

QuickCheck 2.25 Which velocity-versus-time graph goes with this acceleration graph? E. © 2015 Pearson Education, Inc.

QuickCheck 2.26 A ball is tossed straight up in the air. At its very highest point, the ball’s instantaneous acceleration ay is Positive. Negative. Zero. Answer: B © 2015 Pearson Education, Inc.

QuickCheck 2.26 A ball is tossed straight up in the air. At its very highest point, the ball’s instantaneous acceleration ay is Positive. Negative. Zero. © 2015 Pearson Education, Inc.

QuickCheck 2.27 An arrow is launched vertically upward. It moves straight up to a maximum height, then falls to the ground. The trajectory of the arrow is noted. At which point of the trajectory is the arrow’s acceleration the greatest? The least? Ignore air resistance; the only force acting is gravity. Answer: Same at all points. © 2015 Pearson Education, Inc.

QuickCheck 2.27 An arrow is launched vertically upward. It moves straight up to a maximum height, then falls to the ground. The trajectory of the arrow is noted. At which point of the trajectory is the arrow’s acceleration the greatest? The least? Ignore air resistance; the only force acting is gravity. Same at all points. © 2015 Pearson Education, Inc.

QuickCheck 2.28 An arrow is launched vertically upward. It moves straight up to a maximum height, then falls to the ground. The trajectory of the arrow is noted. Which graph best represents the vertical velocity of the arrow as a function of time? Ignore air resistance; the only force acting is gravity. Answer: D © 2015 Pearson Education, Inc.

QuickCheck 2.28 An arrow is launched vertically upward. It moves straight up to a maximum height, then falls to the ground. The trajectory of the arrow is noted. Which graph best represents the vertical velocity of the arrow as a function of time? Ignore air resistance; the only force acting is gravity. D © 2015 Pearson Education, Inc.