Question

At time t= 0 a 2-kg particle has a velocity of (4 m/s) - (3 m/s). At t= 3 s its velocity is (2 m/s) + (3 m/s). During this time the work done on it was:
A) 4 J
B) -4 J
C) -12 J
D) -40 J
E) (4 J) + (36 J)

Answer

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