Finding Friction Force on a Break Pad

AI Thread Summary
To find the friction force applied by the brake pad on the shaft of a turntable, one must consider the turntable's mass, diameter, and rotational speed. The problem involves calculating the deceleration caused by the brake pad over a 15-second period to determine the required friction force. Participants emphasize the importance of following forum guidelines by avoiding homework questions in inappropriate sections and providing prior work for clarity. Proper problem-solving techniques and physics principles are essential for arriving at the correct solution. Engaging in discussions about methodology can enhance understanding of the concepts involved.
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A 30-cm-diameter, 1.6 kg solid turntable rotates on a 1.4-cm-diameter, 450 g shaft at a constant 33 rpm. When you hit the stop switch, a brake pad presses against the shaft and brings the turntable to a halt in 15 seconds.

How much friction force does the brake pad apply to the shaft?

I am struggling with answering this problem and I am not too sure how to approach it.
 
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Hi
This is a homework problem so please post it in the appropriate place. See the top of the Forum Page: "NO HOMEWORK Etc. Etc."
There is a standard way to present your question which involves showing what you have done so far.
 

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