Question

Torque due to a force is maximum on a door if force is applied *

2 points

(a) parallel to the door

(b) perpendicular to the door

(c) at 45° to the door

(d) at 60° to the door

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Answer 1

Answer:

As the torque is the product of force and perpendicular distance from the pivot. So we need a maximum torque for easy opening or shutting a door by applying minimum force. But the force is maximum and torque is minimum near the hinge.

Thus, assertion is correct and reason is incorrect.

Answer 2

Answer:

parallel to the door and d