Two persons are pulling a heavy block with the help of horizontal inextensible strings. At the instant shown, the velocities of the two persons are v_(1) and v_(2) directed along the respective strings with the strings making an angle of 60^(@) between them. (a) Find the speed of the block at the instant shown. (b) For what ratio of v_(1) and v_(2) the instantaneous velocity of the block will be along the direction of v_(1).

Two persons are pulling a heavy block with the help of horizontal inex

1.	Two persons are pulling a heavy block with the help of horizontal inextensible strings. At the instant shown, the velocities of the two persons are v_(1) and v_(2) directed along the respective strings with the strings making an angle of 60^(@) between them. (a) Find the speed of the block at the instant shown. (b) For what ratio of v_(1) and v_(2) the instantaneous velocity of the block will be along the direction of v_(1).
Answer» ANSWER :(a) `(2)/(sqrt(3)) sqrt(v_(1)^(2) +v_(2)^(2) - v_(1)v_(2))` (B) `(v_(1))/(v_(2)) = 2`