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Q. 15

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
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Short Answer

15. FIGURE Q4.15 shows a pendulum at one end point of its arc.

a. At this point, is positive, negative, or zero? Explain.

b. At this point, is positive, negative, or zero? Explain.

FIGURE Q4.15

Part (a) At the end point the angular velocity is zero.

Part (b) At the end point angular acceleration is negative.

See the step by step solution

Step by Step Solution

Part (a)

The relation between tangential velocity and angular velocity is

Here is tangential velocity and is angular velocity.

When the pendulum is at the end point of the arc then is zero because at the end point the velocity is zero.

Part (b)

(b) At the end point angular acceleration ' ' is negative because angular velocity changes from positive value to zero.

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