# Homework Help: Motions in the planes need equation

1. Jan 12, 2010

### zelda1850

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

A 5.0 kg object revolving around a circular track in a horizontal plane at constant speed. The radius of the track is 20. meters and the centripetal force on the object is 4.0 x 10 exponent 2 newtons

1) The objects centripetal acceleration is?

2) The objects speed is?

2. Relevant equations

Ac = Velocity exponent 2 / raidius

how can i find the velocity for the equation?

3. The attempt at a solution

im not sure how to do it yet can someone give me the equations for the problem?

2. Jan 12, 2010

### Gear300

Since you can consider F = ma, you can find the centripetal acceleration since you already have the value of the force and mass. With that, you should be able to solve for the velocity.

3. Jan 12, 2010

### zelda1850

oh thx is the equation the same for objects speed?

4. Jan 12, 2010

### zelda1850

how can i solve the objects speed?