# Homework Help: Calculate Angular Frequency,

1. Dec 11, 2011

### borobeauty66

1. The problem statement, all variables and given/known data

I'm trying to caluclate the angular freequency, given that I've only been given various values for the problem.

Radius 2.0 m, Force applied for 5 s = 94 N. 4 objects each at 90°, each weighing 19kg, and at 1.9m from the axis.

From this, I've calulated the values of the the moment of inertia, and the total torque.

I thought we may need angular frequency to get the momentum, so thought I'd start here.

2. Relevant equations

L = Iω

3. The attempt at a solution

Not sure how to get the frequency from the values I've been given. I know you guys dont give the answers, but tips would be helpful.

2. Dec 11, 2011

### rude man

Well, are the masses 1.9m or 2.0m from the axis?

3. Dec 12, 2011

### borobeauty66

The disk radius is 2.0m, the masses are at 1.9m from the axis.

4. Dec 12, 2011

### rude man

I'm wondering what the point of giving the radius is. Did they specify any mass for the disc, or just the 4 masses?

Where is the force applied?

5. Dec 12, 2011

### borobeauty66

Force is applied tangently, to the rim, therefore at the 2.0 m. Ignore the mass of the disk.

6. Dec 12, 2011

### rude man

Ah, we progress.

OK, so can you figure out how much torque is applied about the table axis during those
5 seconds?