Theory of Machine
When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will

Return to equilibrium position without oscillation
Oscillate with decreasing amplitude
Oscillate with constant amplitude
Oscillate with increasing time period

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

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