Question

( u+u-2 v cos theta=0 )
( x u=7 v cos theta )
( frac{4}{cos a}=v )

# (0) J. 37. In the arrangement shown in figure, the ends P. and Q of an unstrechable string move downwards with uniform speed u. Pulleys A and B are fixed. Mass M moves upwards with a speed. PL (a) u cos e (c) 2u cos e (b) u/cos e (d) 2u/cos e

Solution