February 26, 2017

Homework Help: AP Physics

Posted by Darlene on Friday, February 8, 2008 at 6:15pm.

A small solid marble of mass m and radius r will roll without slipping along the loop-the-loop track if it is released from rest somewhere on the straight section of the track. For the following answers use m for the mass, r for the radius of the marble, R for the radius of the loop-the-loop and g for the acceleration due to gravity. A) From what minimum height h above the bottom of the track must the marble be released to ensure that is does not leave the track at the top of the loop.
B) If the marble is released from height 6R above the bottom of the track, what is the magnitude of the horizontal component of the force acting on it at point Q?

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