Theory of Machine
Creep in belt drive is due to

Material of the belt
Larger size of the driver pulley
Material of the pulley
Uneven extensions and contractions due to varying tension

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Theory of Machine
The maximum fluctuation of energy is the

Variations of energy above and below the mean resisting torque line
Difference between the maximum and minimum energies
Sum of the maximum and minimum energies
Ratio of the mean resisting torque to the work-done per cycle

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