Best way to get a RigidBody to Jump - tapping iPhone Screen

I simply want my sphere to Jump when you tap anywhere on the screen.

It is rolling around fine - simple rigidbody using accelerometer to move.

Should I set up a large invisible button the size of the screen?

And what is the best way to get the ball to jump. Can I add a characterController, though it is a rigid body? Or is it best to simply use velocity.

thanks.

No. See what you can learn about touches. You just need to check to see if any finger just hit the screen.

None of that is good.

http://unity3d.com/support/documentation/ScriptReference/Rigidbody.AddForce.html

http://unity3d.com/support/documentation/ScriptReference/ForceMode.html