Torque & Joules: Fact or Fiction?

In summary: I have no idea about rotational mechanics, linear...In summary, the unit of magnetic dipole moments is calculated by Joule/B, meaning that torque is measured in joules. However, this usage is not recommended, as torque and energy have different definitions, even though they share the same units. Torque is typically measured in N-m, while energy is measured in joules. The equivalent of "distance" in angular motion is angular displacement or radians. Torque can be measured in joules but it is considered misleading to do so because torque does not require two forces, unlike energy. In the case of a rotating coil, it is affected by a torque when two equal forces act on it in opposite directions but have different lines of
  • #36
Doc Al said:
You are thinking of a couple, where two forces are used to create a torque without producing a net force. See: http://en.wikipedia.org/wiki/Couple_(mechanics)
Is the energy done by a couple is equal to zero ?
 
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  • #37
ElmorshedyDr said:
Is the energy done by a couple is equal to zero ?
Why should it be zero?
If the rod starts rotating,it gains rotational kinetic energy.
 
  • #38
adjacent said:
Why should it be zero?

If the rod starts rotating,it gains rotational kinetic energy.
I have no idea about rotational mechanics, linear only.
 
  • #39
ElmorshedyDr said:
I have no idea about rotational mechanics, linear only.


You will have a very difficult time understanding toque thinking only about linear mechanics.
 

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