The maximum acceleration of $5\,kg$ block $.............\,m/s^{2}$
$1$
$3$
$0$
None
Acceleration is zero
(For any value of $F\,5\,kg$ block will not move)
A man of mass $m_1$ is standing on a platform of mass $m_2$ kept on a smooth horizontal surface. If the man starts moving on the platform with a velocity $v$ relative to the platform, then recoil velocity of platform is
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