A block of mass `m` at rest is acted upon by a force `F` for a time t. The kinetic energy of block after time t is

Options

A. `(F^2t^2)/(m)`
B. `(F^2t^2)/(2m)`
C. `(F^2t^2)/(3m)`
D. `(Ft)/(2m)`

Answer

B

Explanation

`K=(P^2)/(2m) =((Ft)^2)/(2m) = (F^2t^2)/(2m)`