Aman Bansal
Last Activity: 12 Years ago
Dear Jeet,
Even a very small force can accelerate an object at rest, but for smaller force the acceleration will be smaller. F1 accelerates the body to velocity v, in some finite time which is not mentioned. Force is a vector quantity, and by convention F1 is positive as it is along the direction of motion of the object.
The other force F2 decelerates the object. Any finite force can decelerate a moving object. But this force opposes the direction of motion of the object so, it is negative.
Thus we conclude, the force F 1 and F 2 must be different. Even if they have same magnitude their direction will be opposite.
Correct answer is (c)
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Aman Bansal
Askiitian Expert