# Anyone pls help me with this qn.

1. Oct 18, 2005

### gunblaze

Lets say i have a ball rolling horizontally at constant speed on a frictionless table in vacumm. When i exert a constant vertical force on the ball. Will the horizontal speed change due to the resultant force in the vertical direction? thx

2. Oct 18, 2005

### Pengwuino

No. As long as its a frictionless surface, a vertical force won't result in any horizontal velocity change.

3. Oct 18, 2005

### whozum

If its frictionless the ball won't be rolling.

4. Oct 18, 2005

### SGT

If the force that started the movement was not applied in a direction passing through the center of mass, the ball will roll even in a frictionless surface.

5. Oct 18, 2005

### whozum

Only if the angular velocity was the exact amount such that for every 2pi radians swept the ball traveled $2\piR$ units of length.. which is way more assuming than necessary for the problem.