Question

A uniform circular disc of mass m and radius r is suspended in a vertical plane by two hinges A and B .hinge reaction at A immediately after hinge B is removed ,is

Answer 1

Answer:

The disc will rotate from hinge a hill hinge a will come at the center line of circular disc to take all the load itself.

Explanation:

Given:

mass of the uniform circular disc is 'm'

radius of the uniform circular disc is 'r'

The ubiform disc is suspended from both the hinges a and b.

So, load (in terms of force) taken by both the hinges is 1/2 mg.

If, one hinge is suppose b is taken away, the disc will rotate from that hinge to the opposite side of the hinge to another side of the hinge that is remain there to take the load.

All the load is taken by the second hinge. Load on second hibge is yotal 'm' load= mg

The disc will come at the position in last stage.

So, that the center of gravity anf fhe vertical load with the hinge come at the same vertical line for the best stability.