# Homework Help: Dynamics of rotational motion

1. Mar 27, 2013

### jano.sl

1. The problem statement, all variables and given/known data

Consider a sphere that is placed at a table. The coefficient of kinetic friction between the sphere and the table is μ. At time t = 0, the velocity of the center of mass of the sphere is Vo = 0, and the sphere is rotating with respect of the horizontal axis with angular velocity ωo.
Find the linear acceleration of the center of mass of the sphere and the angular acceleration of sphere. (picture attached)

https://www.physicsforums.com/attachment.php?attachmentid=57185&d=1364426694

2. Relevant equations

3. The attempt at a solution

So I'm having a hard time understanding rotation problem. Can anyone please explain this to me and the approach to solve it? Thank you

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Last edited by a moderator: Mar 28, 2013
2. Mar 28, 2013

### vela

Staff Emeritus
What in particular are you having trouble understanding? The sphere is skidding on the surface if you're wondering how it can spin yet not move linearly.