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## Homework Statement

A solid disk starts from rest and is accelerated to 25 rad/s in 12 sec. The mass of the disk is 4 kg and the radius is 0.15 m.

What was the angular acceleration of the disk?

What torque was needed to do this?

How much work was done on the disk in this time?

## Homework Equations

I = ½*M*R^2

Torque=F*theta

W= torque*theta

## The Attempt at a Solution

Angular accel => Omega = Omega_initial + at

25 = 0 + a(12)

a=2.1

not sure what to do for the torque or work parts