Answer:
1) ans: The ratio of load to effort in a simple machine is called Mechanical Advantage.
2) ans: Frictuon produced in Simple machine affect the mechanical advantage of a machine.
3) ans: The machine whose efficiency is 100% is called ideal machine.
4) ans: The work done by the machine is called output work.
ans: The work done in the machine is called input work.
5) ans: The turning effect of force is called moment.
