Vocabulary#4 How Inclined Planes Work

Inclined Plane:A straight, slanted surface that is not moved when it is used.
   S:A ramp is an example of an inclined plane.

Screw:An inclined plane wrapped around a central bar.
S:A screw is an example of a simple machine.

Wedge:One or a combination of two inclined planes that is moved when used.
S:A wedge can have one or two slanted surfaces.


Compound Machine:A combination of two or more machines.
S:A scissor is a compound machine.

Efficiency:A ratio of the work done by a machine compared with the work put into the machine.
S:The efficiency can be calculate.