Question

A pair of tongs has 20 cm long arms that can lift a piece of coal of weight 1.5 kgf, by applying an effort at distance 15 cm from the fulcrum. Calculate the mechanical advantage.

• A. 0.75

Answer 1

The correct option is A 0.75

Given,
Effort arm = $15cm$
Load arm = $20cm$
We know that, Mechanical Advantage, (M.A.)$=\frac{\text{Effort arm}}{\text{Load arm}}$
M.A. = $\frac{15}{20}$ =$\frac{3}{4}$ = $0.75$