A pulley with a radius of 3.0 cm and a rotational inertia of 4.5 x 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:

Select one:

a. the heavier block

b. none (all three objects have the same kinetic energy)

c. none (all three objects have the same kinetic energy)

d. either block (the two blocks have the same kinetic energy)

e. the pulley