Theory of Machine
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.

None of these
Same
Perpendicular
Opposite

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

Resultant force is numerically equal to the resultant couple, but neither of them need necessarily be zero
Resultant force and resultant couple are both equal to zero
Resultant couple is equal to zero
Resultant force is equal to zero

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