Question

Which among the following is an example of class 1 lever?

• A. Ferris wheel
• B. See-saw
• C. Bottle opener
• D. Ramp

Answer 1

The correct option is B

See-saw

Depending upon the relative positions of the effort, load and fulcrum, levers are classified into 3 types.

(1) Class 1 levers - Fulcrum is in between load and effort.
(2) Class 2 levers - Load is in between fulcrum and effort.
(3) Class 3 levers - Effort is in between fulcrum and load.

See-saw is a classic example of a class 1 lever. In this case, the fulcrum is in between load and effort.

A Ferris wheel is an example of a wheel and axle.
A bottle opener is an example of a class II lever.
A ramp is an example of an inclined plane.