# Physics Pendulum Problem

1. Oct 20, 2008

### whatsntomake

1. The problem statement, all variables and given/known data
An image of the problem may be found here:

http://i417.photobucket.com/albums/pp258/whatsntomake/Physics/Eight.png [Broken]

A pendulum of length 0.950 m swings in a vertical plane (see figure). When the pendulum is in the two horizontal positions θ = 90° and θ = 270°, its speed is 4.80 m/s.

2. Relevant equations

A=v^2/r

3. The attempt at a solution

Last edited by a moderator: May 3, 2017
2. Oct 20, 2008

### Hootenanny

Staff Emeritus
Welcome to Physics Forums.

Be careful with your significant figures. How many significant figures does the question ask for?

Last edited by a moderator: May 3, 2017
3. Oct 20, 2008

### whatsntomake

Hi, thanks for your quick response.
The problem does not specify any significant figure so it fine to any number of significant digits as long as the answer is close by a certain margin of error.

also I am not sure if the tangential acceleration I had is correct

Last edited: Oct 20, 2008
4. Oct 20, 2008

### Hootenanny

Staff Emeritus
Okay that's fair enough.
How did you calculate it?