The wide - grip pull - up offers a higher degree of difficulty with a greater mechanical advantage, but on the other hand it puts more stress on the shoulder joints. (fitnessandpower.com)
Using proper technique will allow you to use mechanical advantage over the tire's weight advantage. (onnit.com)
By experimenting with simple machines and gears, students learn to manipulate mechanical advantage, a concept that can be applied to construction and engineering projects. (einsteincharter.org)