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August 30, 2015

Homework Help: physics

Posted by Anonymous on Friday, September 28, 2012 at 1:21am.

A mass m = 76.0 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 19.7 m and finally a flat straight section at the same height as the center of the loop (19.7 m off the ground). Since the mass would not make it around the loop if released from the height of the top of the loop (do you know why?) it must be released above the top of the loop-the-loop height. (Assume the mass never leaves the smooth track at any point on its path.)
What is the minimum speed the block must have at the top of the loop to make it around the loop-the-loop without leaving the track?

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