A force F 1 acts on a particle 80 as to accelerate it from rest to a velocity υ. The force F 1 is then replaced by F 2 which decelerates it to rest.

Question

Philoid · Accepted Answer

Option B. is correct option as particle may accelerate with any finite acceleration to reach a velocity in finite amount of time but the particle may decelerate with some other finite amount in finite time . But since it is not necessary , the the magnitude of the force may not be equal.

A force F1 acts on a particle 80 as to accelerate it from rest to a velocity υ. The force F1 is then replaced by F2 which decelerates it to rest.

A force F₁ acts on a particle 80 as to accelerate it from rest to a velocity υ. The force F₁ is then replaced by F₂ which decelerates it to rest.