The force of 25N is exerted on a lever in order to lift a can of beans. The resultant force on the lid is 57N. What is the mechanical advantage of the lever?
Two furniture movers are trying to get a couch into the truck. It is 120N so instead of lifting it straight up they use a ramp. The ramp is 2m high and 13 m high. What is the ideal mechanical advantage?
It takes 379N to drag a piano up a 7m inclined plane. If the ramp is 1.5m high and the force of gravity acting on the cart is 450N what will be the mechanical efficiency?
Why is the mechanical efficiency of a machine always less than 100%?
Name 2 things that will help the efficiency of a machine.
Other Pages...
Clarisse's page on Levers
Clarissse's page on The Inclined Plane and the Lever
Clarisse's quiz for the inclined plane and the lever ANSWERS