Posted by **jim** on Thursday, March 1, 2012 at 11:46am.

A condition for mechanical equilibrium is that the sum of the forces acting equal zero. Another condition is that the sum of the _____A) centrifugal forces also equal zero B) centers of gravity balance.C) torques equal zero.D) rotational inertias equal zero.

E) centripetal forces also equal zero.

- physics -
**drwls**, Thursday, March 1, 2012 at 11:58am
C.

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