Machine Design
When the speed of belt increases,

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

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Machine Design
Plastic flow in ductile materials

Lessens the seriousness of static loading stress concentration
Depends on other considerations
Increases the seriousness of static loading stress concentration
Has no effect on it

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