A Pulley with a Radius of 3

question 39

Multiple Choice

A pulley with a radius of 3.0 cm and a rotational inertia of 4.5 * 10^-3 kg . m² is suspended from the ceiling. A rope passes over it with a 2.0-kg block attached to one end and a 4.0-kg block attached to the other. The rope does not slip on the pulley. At any instant after the blocks start moving the object with the greatest kinetic energy is:

• A) the heavier block
• B) the lighter block
• C) the pulley
• D) either block (the two blocks have the same kinetic energy)
• E) none (all three objects have the same kinetic energy)

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