A thin hoop and a disk with equal radii and equal masses are pivoted (without fr

Question

A thin hoop and a disk with equal radii and equal masses are pivoted (without friction) about their edges, as in the diagram to the right. If both are released from rest from the position shown in the diagram, which of the following quantities is the same for both objects? Use the pivot as the rotational reference point in each case. the rotational velocity at the bottom of the swing the angular momentum at the bottom of the swing the rotational kinetic energy at the bottom of the swing the angular acceleration at the moment of release All of these quantities are equal for the two objects.

Explanation / Answer

Option c

MgR = k.E

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