Please refer diagram attached.
The pulleys are moving down with constant speed u each. Pulleys are light , string ideal. What is the speed with the mass moves up?
The Attempt at a Solution
Now, I got the answer as ucosΘ, obviously. But the answer is u/cosΘ.
the solution too is given. But I feel that the latter is wrong as the velocity goes to to infinity as the mass goes upwards. Please tell me which is correct.