In an Effort to Loosen the Bolt on the Wheel

Multiple Choice

In an effort to loosen the bolt on the wheel of a car, a man with a mass of 70 kg steps on the end of a 50-cm tire iron which is extending horizontally from the bolt. How much torque is he applying to the bolt?

A) 340 N m
B) 14 N m
C) 140 N m
D) 70 N m
E) 35 N m