Choose the correct answer....

Question

If the lever arm of a 5-n force is 7 m, what is the torque acting on the object due to this force?

A.) 35 Nm

B.) 0.71 Nm

C.) 1.4 Nm

D.) 12 Nm

E.) cannot be determined

Answer 1

Torque is the work done on a lever arm when the direction of force is perpendicular to the length of the arm.  Assuming that the force is pushing the lever arm so that it rotates, we multiply force and distance.

 

Torque = (5 n) * (7 m)

           = 35 n m

 

Your answer is (A).