A pendulum bob is released from some initial

Question

height such that the speed of the bob at the
bottom of the swing is 1.5 m/s.
The acceleration of gravity is 9.81 m/s
2
.
What is the initial height of the bob?
Answer in units of m

Answer 1

Initial PE=final KE at bottom
mgh=1/2 mv^2
solve for h.

Answer 2

gnghn