A pendulum, with a 2.0 kg bob, is released from a height of 0.400 m and allowed to swing freely. Determine its minimum speed. I got: E_grav = E_kin --> mgh = 1/2 mv^2 --> v = sqrt (2gh) --> v = sqrt (2*9.8*.4) --> v = 7.84 m/s Is that right? It seems weird; so please tell me if i'm right or wrong. If wrong, please show me what I did wrong. Thanks a lot!