A force F1 acts on a particle so as to accelerate it from rest to a ve

1.	A force F1 acts on a particle so as to accelerate it from rest to a velocity v. The force F1 is then replaced by F2 which decelerates it to rest. (a) F1 must be equal to F2 (b) F1 may be equal to F2 (c) F1 must be unequal to F2 (d) none of these.
Answer» (b) F₁may be equal to F₂ Explanation: Neither the time nor the distance for accelerating and decelerating journey is mentioned. So both forces may or may not be equal.

A force F1 acts on a particle so as to accelerate it from rest to a velocity v. The force F1 is then replaced by F2 which decelerates it to rest. (a) F1 must be equal to F2 (b) F1 may be equal to F2 (c) F1 must be unequal to F2 (d) none of these.

Answer»

(b) F₁may be equal to F₂

Explanation:

Neither the time nor the distance for accelerating and decelerating journey is mentioned. So both forces may or may not be equal.