Rotational Kinetic Energy: A solid sphere, solid cylinder, and a hollow pipe all have equal masses and radii. If the three of them are released simultaneously at the top of an inclined plane and do not slip, which one will reach the bottom first?
A. sphere
B. pipe
C. cylinder
D. The pipe and cylinder arrive together before the sphere.
E. They all reach the bottom at the same time.
Answer: A
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