Question

Forces are applied to a uniform beam pivoted at its centre.Which beam is balanced?

Answer 1

Answer:

To balance the beam, net torque about pivot should be zero

τ

net

=τ

p

+τ

w

Let we need x number of weights.

τ

net

=1×l−(0.2+0.1x)l=0

⟹1=0.2+0.1x

x=8

so we need 8 weights of 0.1 N to balance beam.

Explanation:

hope it helps