Question

Which of the following statements is/are true?

• A. Lemon crusher is a Class II lever.
• B. A ramp is an inclined plane.
• C. See-saw is a wheel and axle.
• D. See-saw is a class I lever.

Answer 1

Answer: (A), (B), (D)

The correct options are
A

Lemon crusher is a Class II lever.

B

A ramp is an inclined plane.

D

See-saw is a class I lever.

In a lemon crusher, one end has a pivot about which the arms are free to rotate. The lemon is placed in the region between the pivot and the point where the arms are pressed close together. Hence, a lemon crusher is a Class II lever as the load is in between the fulcrum and the effort.

A ramp is an inclined plane.

In a see-saw, the fulcrum is in between the two seats where the children sit. Hence, see-saw is a class I lever as the fulcrum is in between the load and the effort.