Q.

A system of masses rotating in different parallel planes is in dynamic balance if the

  • AResultant force is equal to zero
  • BResultant couple is equal to zero
  • CResultant force and resultant couple are both equal to zero
  • DResultant force is numerically equal to the resultant couple, but neither of them need necessarily be zero
Correct Answer : (C)

Resultant force and resultant couple are both equal to zero

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