At the instant $t = 0$ a force $F = kt$ ( $k$ is a constant) acts on a small body of mass $m$ resting on a smooth horizontal surface. The time, when body leaves the surface is
At the instant $t = 0$ a force $F = kt$ ( $k$ is a constant) acts on a small body of mass $m$ resting on a smooth horizontal surface. The time, when body leaves the surface is
- A
$mg\,k\,sin\,\alpha $
- B
$\frac{{k\,\sin \,\alpha }}{{mg}}$
- C
$\frac{{mg\,\sin \,\alpha }}{{k}}$
- D
$\frac{{mg}}{{k\,\sin \,\alpha }}$
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