Question

Q19. Torque due to a force is
maximum on a door if force is
applied
O (a) parallel to the door
O (b) perpendicular to the door
0 (c) at 45° to the door
0 (d) at 60° to the door​

Answer 1

Answer:

(a) parallel to the door

Answer 2

b) perpendicular to the door.

We know that,

Torque = r F sin Φ

Torque will be maximum,

when sin Φ = max=+1 .

Therefore Φ = 90 ° i.e when the force is applied in a direction perpendicular to door the torque will be maximum.

hope it helps..