Torque question

  • #1

Homework Statement


Not really a homework question but a question about units that I can't figure out.

Homework Equations


Torque units = N*m
N=kg*m/s2
I units = kg*m2
a units = m/s2
Now my formula sheet says T=Ia

The Attempt at a Solution



torque=kg*m/s2*m=kg*m2/s2
Ia=kg*m2/s2*m/s2=kg*m3/s2
kg*m3/s2 in not equal to kg*m2/s2 What am I doing wrong?
Thanks for any help
 

Answers and Replies

  • #2
TSny
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Now my formula sheet says T=Ia
It should say ##\tau = I \alpha## where ##\alpha## is the angular acceleration.
 
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Likes Chad Jensen
  • #3
Oh ok. That makes more sense. Thank you so, it is rad/s^2 which rads are considered dimensionless so they can be eliminated with no need to cross multiply or subtract to make them go away. You are then left with 1/s^2. Thank you I knew I was missing something simple. I looked at the formula sheet and it was alpha and not a
 

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