Question

A vertical rectangular door with its centre of gravity at `O` (see figure) is fixed on two hinges `A` and `B` along one vertical length side of the door. The entire weight of the door is supported by the hinge `A`. Then the free body force diagram for the door (the arrows indicate the direction of the forces) is

A.
B.
C.

Answer 1

Correct Answer - B
Because of the W of door tries to rotate it clockwise, so, to oppose this normal at hinges produces anticlockwise torque.