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Two objects of unequal mass are connected by a massless cord passing over a frictionless pulley. After the objects are released from rest, which of the following statements is true? (U = gravitational potential energy, K = kinetic energy of the system.)
a) ∆U < 0 and ∆K > 0
b) ∆U = 0 and ∆K > 0
c) ∆U < 0 and ∆K = 0
d) ∆U = 0 and ∆K = 0
e) ∆U > 0 and ∆K <0
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