A heavy bank-vault door is opened by the application of a force of 3.0 x 102 N directed perpendicular to the plane of the door at a distance of 0.80 m from the hinges. What is the torque?

120 N·m

240 N·m

300 N·m

360 N·m

For this question, we need the formula τ = F x d, and just plug the numbers in.

Given the formula τ = F x d

Where τ = torque,

F = force applied, &

d = distance from the axis / hinge,

τ = 300 c 0.8 = 240Nm

Disregard the weight of the door or if there's any friction at the hinge. None of this will change the torque applied.