A particle of mass $m$ at rest is acted upon by a force $P$ for a time $t.$ Its kinetic energy after an interval $t$ is
A particle of mass $m$ at rest is acted upon by a force $P$ for a time $t.$ Its kinetic energy after an interval $t$ is
- A
$\frac{{{P^2}{t^2}}}{m}$
- B
$\frac{{{P^2}{t^2}}}{2m}$
- C
$\frac{{{P^2}{t^2}}}{3m}$
- D
$\frac{{{P}{t}}}{2m}$
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