- #1
Nexus99
- 103
- 9
- Homework Statement
- Two balls of mass m are bounded by two wires of equal lenght to a third ball of mass 2m.
The wire passes on two pulleys, that are distant 2l. The ball of mass 2m, initially firm at the same
height of the pulleys and at the same distance from them, is dropped until it reaches the floor, distant h from the initial height. Which is its velocity in that moment?
- Relevant Equations
- Conservation of energy
i tried with conservation of energy.
##E_i = 0 ##
##E_f = 2 m v^2 - 2mgh - 2mg(\sqrt{h^2 + l^2} - l) ##
## v = \sqrt{g(h - l + \sqrt{h^2 + l^2})} ##
Is it right?