A sphere with the same mass and radius as the original cylinder, but a smaller rotational inertia, is
released from rest from the top of the ramp. K.
and K, are the sphere's and the cylinder's total
kinetic energy at the bottom of the ramp,
respectively. How do K, and K, compare, and
why?
(A) K, rotational kinetic enqey.
(B) Ks greater acceleration and therefore has
less time to gain kinetic energy.
(C) Ks = Kc , because both objects accelerate
at the same rate.
(D) Ks = Kc , because the gravitational force
does equal work on each object as it rolls
down the ramp.
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