# Homework Help: Determine its maximum angular displacement

1. Nov 29, 2007

### andric_mcneil

1. Really Stuck here i've got the period but after that like i said i'm stuck

A simple pendulum having a length of 1.53 m and a mass of 6.74 kg is given an initial speed of 1.36 m/s at its equilibrium position. Assume it undergoes simple harmonic motion.
(a) Determine its period.
2.48 s
(b) Determine its maximum angular displacement.
°

2. Relevant equations

????? θ = θmcos(ωt)
????
3. The attempt at a solution

A.I'VE GOT THE PERIOD BUT I CAN'T GET maximum angular displacement

2. Nov 29, 2007

### G01

You need to show some work to get help here. I can't know what is confusing you if you don't show me where you are getting stuck. If your stuck at a point before you have done any calculations, then try answering these questions:

How did you find the period?

Can you give me a formula for the displacement/velocity of the pendulum?

Do you know what the problem is asking for when it says, "Maximum angular displacement?"

What is the velocity of the pendulum when it is at maximum angular displacement?

Last edited: Nov 29, 2007