The acceleration (in m/s2) of movable pulley P is and block B is , if acceleration of block A=1m/s2 downwards.
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Solution
From the figure, we can say: SM+ON+RB=constant
If block B is assumed to move up, pulley P will move down so that the string between them remains taught. ∴vP+vP+(−vB)=0 ⇒2vP=vB ⇒2aP=aB