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A student is sitting on a frictionless rotating stool with her armsoutstretched holding equal heavy weights in each hand. If shesuddenly lets go of the weights will her angular speed:
a. get faster
b. get slower
c. stay the same
d. stop

Respuesta :

Answer:

option (a)

Explanation:

As no external torque is applied so the angular momentum is conserved.

Angular momentum having weights = angular  momentum without weights

Angular momentum = moment of inertia x angular speed

As student go off the weighs, the moment of inertia decreases and thus, the angular velocity increases.

Thus, option (a) is correct.

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