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Two block a and B having masses m(1)=1 k...

Two block a and B having masses `m_(1)=1 kg, m_(2)=4 kg` are arranged as shown in the figure. The pulleys P and Q are light, and frictionless. All the blocks are resting on. a horizontal floor and the pulleys ate held such that strings remains just taut.
At.moment `t=0 a` force `F=30t (N)` starts acting on thei ipulley p along . vertically upward direction as shown in the pulley P along vertically upward direction as shown in the figure. Calculate.
(i) the time when the blocks A and B loose contact with ground.
(ii) the. velocity of A when B looses contact with ground.
(iii) the height raised. by A upto this instant.
(iv) the work done by the force F upto this instan.

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Two blocks A and B having masses m_(1)=1 kg m_(2)=4 kg are arranged as shown in the figure The pulleys P and Q are light and frictionless. All the blocks are resting on a horizontal floor and the pulleys are held such that strings remains just taut. At moment t=0 a force F=30 t (N) starts acting on the pulley P along vertically upward direction as shown in the figure The time when the blocks A and B loose contact with ground is 4//x sec then x is:

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