Question

A force 'P' newton acts on a particle so as to accelerate it from rest to a velocity 'v' m/s. The force 'p' is then replaced by 'Q' newton which decelerates it to rest.

1 P must be equal to Q
2 P must be unequal to Q
3 P may be equal to Q
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Answer 1

Answer:

1 P must be equal to Q