Question

In an experiment to determine the mass of a given body using a metre scale by principle of moments, the mass of weight in the paper pan is 30 g and the length of the weight arm is 20 cm. If the fixed length of the power arm is 25 cm, then the unknown mass is –

• A. (a) 18 g
• A. (b) 20 g
• A. (c) 24 g
• A. (d) 28 g

Answer 1

(c)

Sol. x = $\frac { 30 \times 20 } { 25 }$ = 24 g