Finding the Height of a Nail for a Rolling Cylinder without Slipping

[Oerg]

(I take it you mean a stationary wheel)

It depends where you apply the force.

If the point of application is the centre of the wheel (or if the line of application passes through the centre), then I agree. But if the point of application is off-centre, then the wheel will accelerate and will start to turn.

:

yes that was what i meant. The difference being that if there was friction, then the wheel would turn.

again, i thought that slipping means that something doesn't have enough grip. And with grip you have friction. So in order to see when the wheel would slip, you got to have friction for that./

 

[tiny-tim]

yes that was what i meant. The difference being that if there was friction, then the wheel would turn.

You're missing my point, that even that if there is no friction, then the wheel can still turn:

But if the point of application is off-centre, then the wheel will accelerate and will start to turn.

You agree?

Then, if you judge the point of application right, the velocity and the turn may match, and there will be no slipping - even on ice!

Do you agree?