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Question

The graph between the resistive force F acting on a body and the distance covered by the body is shown in the figure. The mass of the body is 25 kg and the initial velocity is 2m/s. When the distance covered by the body is 4, its kinetic energy would be:
1127913_87bb3dd50fac492aa0a3d14806bd792e.png

A
50 J
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B
40 J
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C
20 J
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D
10 J
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Solution

The correct option is A 50 J
kinetic energy

k=12mv2

m is mass
v is velocity

K=12mV2=12×25×22=12×25×4

K=50=50J



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