Angular acceleration given force, moment arm and inertia?

  • Thread starter joema
  • Start date
  • #1
100
3

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?
 

Answers and Replies

  • #2
6,054
391
Looks good, except for significant digits.
 
  • #3
747
36
Should be 33, yes? i.e. 2 sig figs
 
  • #4
6,054
391
Yep.
 

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