A pendulum 1.70m long is released (from rest) at an angle 30 degrees.
1. Determine the speed(m/s) of the 60.0g bob at Theta = 15.
2. Determine the tension in the cord at the lowest point Theta = 0.
3. Determine the tension in the cord at Theta = 15.
A formula would be appreciated and a decent explanation would be excellent.
-Thanks.