- #1
phymatter
- 131
- 0
Homework Statement
[URL=http://img18.imageshack.us/i/questionf.png/][PLAIN]http://img18.imageshack.us/img18/4880/questionf.png[/URL]
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Homework Equations
if the 2 wires on both sides move with downward velocity u , with what velocity does the block rise , the angle with vertical is a ;
The Attempt at a Solution
i cannot figure out the solution, i think it should be 2ucos(a)
please help!1