Question

The door of an almirah is 6 ft high, 1.5 wide 8 kg . The door is supported by two hings situated at a distance of 1 ft from the ends. If the magnitude of the forces exerted by the hinges on the door are equal, find this magnitude.

Answer 1

Let force on each Hinge be $f$ acting vartically.

From equilibrium in vertical direction,

$2f=Mg$

$\Rightarrow f=\frac{Mg}{2}=\frac{8\times 10}{2}=40N$