Understanding Torque

Torque is a twisting force that causes rotation. It depends on the force applied and the distance from the pivot point (in this case, the hinges).

Formula

Torque (τ) = Force (F) x Distance (r)

Calculation

* Force (F) = 30 N

* Distance (r) = 0.85 m

Torque (τ) = 30 N * 0.85 m = 25.5 N·m

Answer

You exert a torque of 25.5 N·m on the door.