Rotational Motion of a pendulum bob

[piizexakly3]

A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 3.0 m/s. What is the initial height of the bob?

I am not asking to do the problem for me, I am just unsure how to approach this problem. I am just looking for what i need to solve for in order to find the height.

 

[LowlyPion]

A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 3.0 m/s. What is the initial height of the bob?

I am not asking to do the problem for me, I am just unsure how to approach this problem. I am just looking for what i need to solve for in order to find the height.

Consider the conservation of energy.

PE = KE