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 I levers - Fulcrum is in between load and effort.
(2) Class II levers - Load is in between fulcrum and effort.
(3) Class III 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.

Ferris wheel is an example of wheel and axle.
Bottle opener is an example of class II lever.
Ramp is an example of an inclined plane.