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5/31 MCQs for:
MECHANICS : ENERGY - Machines
A machine has a velocity ratio of 5 and a mechanical advantage of 4. What is its efficiency?
Why is no machine 100% efficient?
Which of the following is a second-class lever?
If the mechanical advantage of a pulley system is 6, what does this indicate?

A machine raises a load of 600 N through a distance of 2.5 m when an effort of 100 N moves through a distance of 20 m.

The efficiency of this machine is: