Question

How can you determine the speed of a Pendulum?

Answer 1

I have period, length, vertical displacement and mass.

Answer 2

http://hyperphysics.phy-astr.gsu.edu/hbase/pend.html

Answer 3

But how would you find velocity from that?

Answer 4

Well velocity isn't a constant in a pendulum, you would have to use simple harmonic motion equations

Answer 5

I mean the maximum velocity, my bad

Answer 6

Just use conservation of energy
\[\large \Delta PE = \Delta KE\]so
\[\large mgh = 0.5 m v^2\] where h is the max height of the pendulum above it's equilibrium position.

Answer 7

I see, do I need to know the bob's height from the ground?

Answer 8

No, just the change in height from the lowest point to the highest.

Answer 9

I see, thanks so much!