Question

A rod of weight $w$ is supported by two parallel knife-edges $A$ and $B$ and is in equilibrium in a horizontal position. The knives are at a distance $d$ from each other. The centre of mass of the rod is at distance $x$ from $A$. The normal reaction on $A$ is.......... and on $B$ is............

Answer 1

$TorqueaboutpointA{N}_{B}d-wx=0\Rightarrow N_B=\frac{wx}{d}TorqueaboutpointB{N}_{A}d-w(d-x)=0\Rightarrow N_A=\frac{w(d-x)}{d}$