5. On a horizontal grassland, John rolls a ball for his dog to catch. At time t = 0, John stands side by side with the dog and rolls the ball forward in a straight line. The dog immediately starts to run towards the ball. Figure 5.1 shows an instant at which the dog is running toward the ball. John Figure 5.1 The ball stops after a while, and the dog reaches the ball some time later. The velocity- time graph of the dog is shown in Figure 5.2. velocity/m s¹ 6 4 2 0 1 2 34 time / s 5 Figure 5.2 (a) Describe the motion of the dog between t = 0 s and 5.5 s. (3 marks) (b) The dog reaches the ball at t = 5.5 s. How far did the ball roll? (2 marks) (c) John rolls the ball with an initial velocity of 6 m s¹ and it decelerates uniformly afterwards. Draw the velocity-time graph of the ball in Figure 5.2. (2 marks)

5. On a horizontal grassland, John rolls a ball for his dog to catch. At time t = 0, John stands side by side with the dog and rolls the ball forward in a straight line. The dog immediately starts to run towards the ball. Figure 5.1 shows an instant at which the dog is running toward the ball. John Figure 5.1 The ball stops after a while, and the dog reaches the ball some time later. The velocity- time graph of the dog is shown in Figure 5.2. velocity/m s¹ 6 4 2 0 1 2 34 time / s 5 Figure 5.2 (a) Describe the motion of the dog between t = 0 s and 5.5 s. (3 marks) (b) The dog reaches the ball at t = 5.5 s. How far did the ball roll? (2 marks) (c) John rolls the ball with an initial velocity of 6 m s¹ and it decelerates uniformly afterwards. Draw the velocity-time graph of the ball in Figure 5.2. (2 marks)

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter4: Motion In Two And Three Dimensions

Section: Chapter Questions

Problem 24P: Clay Matthews, a linebacker for the Green Bay Packers, can reach a speed of 10.0 m/s. At the start...

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