8. A particle of mass m, initially at rest, is acted upon by a variable force F for a brief interval of time T. It begins to move with a velocity u after the force stops acting. F is shown in the graph as a function of time. The curve is a semicircle.
Ans. c
(52)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)