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Physics with MasteringPhysics | 4th Edition | ISBN: 9780321541635 | Authors: James S. Walker
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Suppose the pendulum bob in Figure has a mass of 0.33 kg

Chapter 8, Problem 34P

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QUESTION:

IP Suppose the pendulum bob in Figure 8–20 has a mass of 0.33 kg and is moving to the right at point B with a speed of 2.4 m/s. Air resistance is negligible. (a) What is the change in

the system’s gravitational potential energy when the bob reaches point A? (b) What is the speed of the bob at point A? (c) If the mass of the bob is increased, does your answer to part

(a) increase, decrease, or stay the same? Explain. (d) If the mass of the bob is increased, does your answer to part (b) increase, decrease, or stay the same? Explain.

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QUESTION:

IP Suppose the pendulum bob in Figure 8–20 has a mass of 0.33 kg and is moving to the right at point B with a speed of 2.4 m/s. Air resistance is negligible. (a) What is the change in

the system’s gravitational potential energy when the bob reaches point A? (b) What is the speed of the bob at point A? (c) If the mass of the bob is increased, does your answer to part

(a) increase, decrease, or stay the same? Explain. (d) If the mass of the bob is increased, does your answer to part (b) increase, decrease, or stay the same? Explain.

ANSWER:

Step 1 of 7

In the given case of pendulum with bob of mass  is moving to right from point B to point A with speed of . Here we need to calculate the change in system’s gravitational potential energy when the bob reaches point A and the speed of the bob when it is at point A.

Given data,

Mass.

Speed of bob at point B,

Angle,

Length,

To find,

(a) Change in system’s gravitational potential energy when the bob reaches point A,

(b) Speed of the bob when it is at point A,

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