Question

A uniform solid sphere is released from rest from the top of an inclined plane of inclination theta. Then choose the correct option(s). A. The minimum coefficient of friction between sphere and the incline to prevent slipping is 2/7 tan theta. B. The kinetic energy of the solid sphere as it moves down a distance S on the incline is mgS sin theta if mu > 2/7 tan theta. C. The magnitude of work done by friction on the solid sphere is less than mu mgS cos theta as it moves down a distance S on the incline if mu < 2/7 tan theta. D. The magnitude of work done by friction on the solid sphere is equal to mu mgS cos theta as it moves down.

          A uniform solid sphere is released from rest from the top of an inclined plane of inclination theta. Then choose the correct option(s).

A. The minimum coefficient of friction between sphere and the incline to prevent slipping is 2/7 tan theta.
B. The kinetic energy of the solid sphere as it moves down a distance S on the incline is mgS sin theta if mu > 2/7 tan theta.
C. The magnitude of work done by friction on the solid sphere is less than mu mgS cos theta as it moves down a distance S on the incline if mu < 2/7 tan theta.
D. The magnitude of work done by friction on the solid sphere is equal to mu mgS cos theta as it moves down.

Added by Virginia V.

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