Discussion
The creep in a belt drive is due to the :
Answer: A
Creep is due to the unequal tension on the tight and slack sides of the belt.
The tight side of a belt is stretched more than the slack side. As a part of the belt passes round the driving pulley from the tight side to the slack side, it contracts, and as it passes round the driven pulley it stretches again. This relative movement between belt and pulley is called creep, and it makes the driven pulley turn slightly slower than the diameters alone would give.
Creep is caused by the belt's elasticity under unequal tension, not by the material of the pulleys or their size.
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