I was just trying to do my exam revision when i got totally stuck at this question. here's what it says:
The mechanism shown in figure 1.1 lies in a vertical plane and is released from rest in the position for which theta=60 degrees, where the spring is unstretched. Plot the speed of the 4kg sphere as a function of angle theta and determine:
A) The maximum speed of shere with the corresponding value of angle theta.
B) The maximum angle theta reached by the link.
Friction and the mass of the links are small and may be neglected.