Question

Which one of the following is an example of class I lever and M.A >1?

• A. Scissors
• B. Seesaw
• C. A physical balance
• D. Claw Hammer

Answer 1

The correct option is D

Claw Hammer

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

(1) $ClassIlevers$

(2) $ClassIIlevers$

(3) $ClassIIIlevers$

For $ClassIlevers$, the mechanical advantage can have any value either greater than 1, equal to 1 or less than 1.

M.A of a lever $=\frac{Effortarm}{Loadarm}$

If Effort arm > load arm, then M.A >1.

In claw hammer, effort arm is greater than load arm.

So, M.A>1

See saw and physical balance - class I lever and M.A = 1

Scissors - class I lever and M.A < 1