Question

A boy of 30 kg balances a aman of 60 kg on a see-saw ata distance of 1.5 m from the fulcrum. The distance the man from the fulcrum is:

• A. 1 m
• B. 1.2 m
• C. 0.75 m
• D. 0.5 m

Answer 1

The correct option is C 0.75 m

Solution

REF.Image

For maintaining balance,

there should be

rotational equilibrium

For that, net torque about will

be zero.

So, $\left(60\right)gx-\left(1.5\right)\left(30g\right)=0$

$\Rightarrow x=1.5\frac{\left(30\right)}{60}=0.75m$

Option - C is correct.