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A solid disk and a solid hoop (both of same total mass) both roll down identical

ID: 1472288 • Letter: A

Question

A solid disk and a solid hoop (both of same total mass) both roll down identical inclines of the same height and slope. When they reach the bottom, they continue on a flat surface (no incline). Assume no dissipative forces act. Which of the following is true? (select all that apply)

a) The hoop has more total kinetic energy (translational plus rotational) than the disk

b)The hoop has more translational kinetic energy than the disk.

c)The hoop has more rotational kinetic energy than the disk.

d)The hoop is moving slower (its center of mass has a smaller speed) than the disk.

Explanation / Answer

a) false

b) false

c) true

d) true

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