Torque,flywheels and angular acceleration

[tomhitchmough]

ive been trying to do this question all summer to no joy. I've got a flywheel in motion which then has a torque applied for short period and i need to find the angular acceleration. i know its something to do with inertia but I am completely lost cheers

 

[Doc Al]

Newton's 2nd law applied to rotation will give you the angular acceleration: Torque = Iα. (I is the rotational inertia of the flywheel.)

 

[tomhitchmough]

yer cheers I've done that and I've got a angular acceleration of 1000 rads-2 for 10kg disc radius 0.1m for a torque applied of 50Nm which seems a bit big