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Question
State the incorrect statement:
Options
A machine always has efficiency less than 100%.
The mechanical advantage of a machine can be less than 1.
A machine can be used as speed multiplier.
A machine can have the mechanical advantage greater than the velocity ratio.
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Solution
A machine can have the mechanical advantage greater than the velocity ratio.
Reason:
If the mechanical advantage of a machine is greater than its velocity ratio, then it would mean that the efficiency of a machine is more than 100%, which is practically not possible.
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