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

Options

A. directly proportional to velocity
B. inversely proportional to velocity
C. zero
D. constant

Answer

B

Explanation

`(1)/(2) mv_(2) = ct`
`(m)/(2) 2v (dv)/(dt) =c`
`rArr m (dv)/(dt) = (c)/(v) F alpha (1)/(v)`