The kinetic energy (KE) versus time graph for a particle moving along a straight line is as shown in the figure. The force versus time graph for the particle may be

Options

A.
B.
C.
D.

Answer

`(4)`

Explanation

`E_(k) = 1/2 mv^(2) = kt, Rightarrow power P = (dE_(k)/dt) = k`
In this case, `P = Fv`
Hence , `F = P/v = K/sqrt(2Kt//m) = K./sqrt t `where K. is another constant