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Torque question

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chumura10
 
Reply Thu 1 Dec, 2005 12:21 pm
If there is no external torque acting on an object then the object's ______ is zero.

a) angular velocity
b) moment of inertia
c) angular acceleration
d) angular momentum

I think the answer is d.
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Brandon9000
 
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Reply Thu 1 Dec, 2005 12:42 pm
No, it's c.

T = I A

Where T = torque, I = moment of inertia, and A = angular acceleration (I have no way to make the more familiar alpha symbol)

It's similar to F = MA.
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