1. Mechanics sometimes put a length of pipe over the handle of a
wrench when trying to remove a very tight bolt. How does this help?
(It is also hazardous since it can break the bolt.)

2. When tightening a bolt, you push perpendicularly on a wrench
with a force of 165 N at a distance of 0.140 m from the center of
the bolt. (a) How much torque are you exerting in newton A????1 meters
(relative to the center of the bolt)? (b) Convert this torque to
footpounds.

3. Two children of mass 20 kg and 30 kg sit balanced on a seesaw
with the pivot point located at the center of the seesaw. If the
children are separated by a distance of 3 m, at what distance from
the pivot point is the small child sitting in order to maintain the
balance?