Machine Design
The power transmitted by means of a belt depends upon

All of these
Arc of contact between the belt and the smaller pulley
Tension under which the belt is placed on the pulleys
Velocity of the belt

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Machine Design
Slenderness ratio is the ratio of

Effective length of column to least radius of gyration of the column
Width of column to depth of column
Maximum size of column to minimum size of column
Effective length of column to width of column

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