# Rotational Mechanics: Sphere collision problem

1. May 24, 2012

### shreyashebbar

Hello everyone,

A solid sphere of Mass M and Radius R rolling (pure) encounters a protrusion on the surface of height R/4. Its in the form of a step. What can be the maximum velocity V of sphere so that it doesn't leave contact from surface and final velocity?

Attached below is a figure:

Thanking in anticipation

Regards

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2. May 24, 2012

### Zubeen

I ts not clear what you actually want to ask !!!!! do you wish to know the least velocity that the sphere should have to get above that protrusion ???

3. May 24, 2012

### shreyashebbar

Apologize for not making it clear.
Yeup I wish to know the maximum velocity the sphere can roll such that when it strokes the step and rolls over it it doesnt jump is leave touch with the surface.

Regards

4. May 24, 2012

### tiny-tim

5. May 24, 2012

### Zubeen

OK , you should try it first.
let me give you just a hint.
Law of energy conservation. its the hint.
now can you do it ?