Question

A fire tongs has its arms $20cm$ long. It is used to lift a coal of weight $1.5kgf$ by applying an effort at a distance $15cm$ from the fulcrum. Find the mechanical advantage of fire tongs.

• A. $3$
• B. $0.50$
• C. $0.90$
• D. $0.65$

Answer 1

The correct option is A $3$

Effort Arm $=15cm$
Load Arm $=20-15=5cm$
Mechanical Advantage $=\frac{\text{Effort Arm}}{\text{Load Arm}}=\frac{15}{5}=3$