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The graph between the resistive force F ...

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 initial velocity is `2 m//s`. When the distance covered by the body is `4m`, its kinetic energy would be

A

50 J

B

40J

C

20J

D

10 J

Text Solution

Verified by Experts

The correct Answer is:
D
Area under curve `=(1)/(2) (4)(20)=40 J`
W=work done by resistive F=-40 J
-40 =`K_(f)-K_(i), K_(i)=50 J,` so `K_(f)=50-40 =10 J`
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