Machine Design
When the speed of belt increases,

The coefficient of friction between the belt and pulley increases
The power transmitted will increase
The power transmitted will decrease
The coefficient of friction between the belt and pulley decreases

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Machine Design
For unequal width of butt straps, the thicknesses of butt straps are

0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
0.75 t for both the straps on the inside and outside
0.625 t for both the straps on the inside and outside
0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside

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