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Assuming a ball of mass m and of radius ...

Assuming a ball of mass m and of radius r to roll down from the top without slipping. Neglect energy losses due to rolling friction.

Text Solution

Verified by Experts

The correct Answer is:
`alpha="arccos"0.50-54^@`
The method of solving the problem is the same as for Problem 12.7, the only exception being that in this case one should take into account the kinetic energy of rotation of the ball:
`N=(mg)/7(17cos alpha - 10)`
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