# Force to keep a Object in Orbit

1. May 17, 2010

### Bjarne

How is it possible to calculate the force it takes to keep an object in a orbit

This is not homework..

2. May 17, 2010

### Cyosis

You can calculate the centripetal force from $F=m \omega^2 r$.

3. May 17, 2010

### Bjarne

What is "w"

4. May 17, 2010

### Mu naught

angular velocity, in radians per second.

w = 2pi/T

5. May 20, 2010

### Bjarne

How is it possible to calculate the: force that is transferred back to the cowboy, and hence the loses of speed,(off the bull) - assuming that the bull want to move away from the cowboy, (straight) but because of the string it is force to stay in constant orbit ?

Last edited: May 20, 2010