Question

Two unlike forces (parallel) of 10 N and 25 N act at a distance of 12 cm. from each other. Find the point about which the body balance.

Answer 1

Let the balance be at x cm from the 25 N force.

Anti-clockwise moment = 10 (12 − x)

Clockwise moment = 25 x

Applying the principle of moments,

⇒ 10 (12 − x) = 25 x

⇒ 120 − 10 x = 25 x

⇒ 35 x = 120

⇒ x = `120/35`

= 3.43 cm.

∴ The body balances at the 3.43 cm mark.