JEE Advance - Physics (1982 - No. 3)
In the arrangement shown in Fig. the ends P and Q of an unstretchable string move downwards with uniform speed U. Pulleys A and B are fixed.
Mass M moves upwards with a speed
Mass M moves upwards with a speed
$$2U\cos \theta $$
$${U \over {\cos \theta }}$$
$${{2U} \over {\cos \theta }}$$
$$U\cos \theta $$