For the system shown in figure, the string is light and pulley is frictionless. The \( 4 \mathrm...

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For the system shown in figure, the
string is light and pulley is frictionless.
The \( 4 \mathrm{~kg} \) block is given an upward
velocity of \( 1 \mathrm{~m} / \mathrm{s} \).
The centre of mass of the two blocks
will [neglect the impulse duration]
(1) accelerate down with \( g / 3 \).
(2) initially accelerate downwards with \( g \) and then after
some time accelerate down with \( g / 3 \).
(3) initially accelerate with \( \vec{g} \) and then the acceleration is 0
(4) initially accelerate with \( \vec{g} \) and then with accelerate with
\( g / 9 \).
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