Theory of Machine
The unbalanced force due to revolving masses

Varies in direction but constant in magnitude
Varies in magnitude and direction both
Varies in magnitude but constant in direction
Constant in magnitude and direction both

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Theory of Machine
When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the

Tension in the slack side of the belt
Sum of the tensions on the tight side and slack side of the belt
Average tension of the tight side and slack side of the belt
Tension in the tight side of the belt

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