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Chapter 11, Problem 63P

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QUESTION:

Apuck on a horizontal, frictionless surface is attached to a string that passes through a hole in the surface, as shown in Figure 11–34. As the puck rotates about the hole, the string is pulled downward, bringing the puck closer to the hole. During this process, do the puck’s (a) linear speed, (b) angular speed, and (c) angular momentum increase, decrease, or stay the same?

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QUESTION:

Apuck on a horizontal, frictionless surface is attached to a string that passes through a hole in the surface, as shown in Figure 11–34. As the puck rotates about the hole, the string is pulled downward, bringing the puck closer to the hole. During this process, do the puck’s (a) linear speed, (b) angular speed, and (c) angular momentum increase, decrease, or stay the same?

ANSWER:

Step 1 of 4

Part (a)

A puck rotates about the hole on a horizontal table. It is attached to a string and the string is pulled down. The puck is brought closer to the hole. We are going to find the linear speed of the puck.

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