Solutions:
The three types of levers are as follows:
(i) Class I levers:
The fulcrum F is located between the effort E and the load L in this type of lever.
A claw hammer, a beam from a physical balance, a crowbar, and a seesaw are among examples.
(ii) Class II levers:
The load L is located between the effort E and the fulcrum F in these levers. As a result, the load arm is always longer than the effort arm.
A wheelbarrow, a paper cutter, a door, and a nutcracker are among examples.
(iii) Class III levers:
The effort E is located between the fulcrum F and the load L in these levers. As a result, the load arm is always smaller than the effort arm.
For instance, fire tongs, a knife, a fishing rod, and sugar tongs