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Figure 8-31 shows a ball with mass m ! 0.341 kg attached

Fundamentals of Physics | 10th Edition | ISBN: 9781118230718 | Authors: David Halliday

Problem 4 Chapter 8

Fundamentals of Physics | 10th Edition

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Fundamentals of Physics | 10th Edition | ISBN: 9781118230718 | Authors: David Halliday

Fundamentals of Physics | 10th Edition

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Problem 4

Figure 8-31 shows a ball with mass m ! 0.341 kg attached to the end of a thin rod with length L ! 0.452 m and negligible mass. The other end of the rod is pivoted so that the ball can move in a vertical circle. The rod is held horizontally as shown and then given enough of a downward push to cause the ball to swing down and around and just reach the vertically up position, with zero speed there. How much work is done on the ball by the gravitational force from the initial point to (a) the lowest point, (b) the highest point, and (c) the point on the right level with the initial point? If the gravitational potential energy of the ballEarth system is taken to be zero at the initial point, what is it when the ball reaches (d) the lowest point, (e) the highest point, and (f) the point on the right level with the initialpoint? (g) Suppose the rod were pushed harder so that the ball passed through the highest point with a nonzero speed.Would "Ug from the lowest point to the highest point then be greater than, less than, or the same as it was when the ball stopped at the highest point? L r Ice flake Figure 8-32 5 and 11. Figure 8-29 2 and 9. Figure 8-31 4 and 14.

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Textbook: Fundamentals of Physics
Edition: 10
Author: David Halliday
ISBN: 9781118230718

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