How long is the standard bolt-wrench that comes with most automobiles? how much force would you need to push with in order to move a bolt that requires 250 ftlbs of torque to turn? why is it a good idea to buy a 2ft extension of copper pipe when you get your first car?

C. 0 J

Explanation:

When an object moves in a circle, friction provides the centripetal force. Hence, it is acting towards the centre of the circle. The displacement of the object is tangential to the circle at the point of interest. Hence, the angle between the frictional force and the displacement is 90°.

Work done is given by

W = Fd cos θ

where F is the force, d is the displacement and θ is the angle between them.

W  = Fd cos 90° = 0 J

Hence, the work done by friction is 0 J.