Q.

The kinetic energy of a body moving along a straight line varies with time as shown in the figure. The force acting on the body is

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a

Constant

b

directly proportional to velocity

c

inversely proportional to velocity

d

Zero

answer is D.

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Detailed Solution

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12mv2=kt  k=constant a=dvdt1v

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The kinetic energy of a body moving along a straight line varies with time as shown in the figure. The force acting on the body is