A body is initially at rest. It undergoes one dimensional motion with constant acceleration. The power delivered to it at time t is proportional to 

Options

A. `t^(1//2)`
B. `t`
C. `t^(3//2)`
D. `t^2`

Answer

B

Explanation

Using `v = u + at :.v = at ( :. u = 0)`
As power , `P = F xx v :. P = (ma) xx at = ma^2 t`
As m and a are constants, `:.` P prop t` .