Angular acceleration given force, moment arm and inertia?

[joema]

Homework Statement

Find angular acceleration in deg/sec^2 given the following factors:

- Total mass: 4889 kg
- Moment of inertia: 4620 kg*m^2
- Moment arm length from center of mass: 1.5 meters
- Force on moment arm tangent to mass: 1779 Newtons

Homework Equations

torque = force * moment arm length
torque = 1779 Newtons * 1.5 meters
torque = 2668.5 Newton-meters

angular acceleration = torque / moment of inertia

The Attempt at a Solution

angular acceleration = 2668.5 N-m / 4620 kg*m^2

angular acceleration = 0.576 radians/sec^2 = 33.05 degrees/sec^2

Is this right?

 

[voko]

Looks good, except for significant digits.

 

[barryj]

Should be 33, yes? i.e. 2 sig figs

 

[voko]

Yep.