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## Homework Statement

A ball (hollow sphere) of radius .11m and mass .444kg is mounted on a frictionless axle. A massless cord is wrapped around the ball supporting an object of mass .02kg. Find the angular acceleration of the wheel, linear acceleration of the object and tension in the cord.

## Homework Equations

## The Attempt at a Solution

[tex]\Sigma[/tex]F=F

_{g}+T=m*a

-.2+T=.02a

[tex]\Sigma[/tex][tex]\tau[/tex]=F*r=I*[tex]\alpha[/tex]

-T*.11=(.0036*a)/.11

T = -.2975*a

-.2 + .2975*a = .02*a

-.2 = -.2775a

.72 = a

That's what I tried, but it's wrong.

Can anyone help?