match the simple machine with the correct definition.



- class lever

plane
- class lever
and axle

- class lever
a. any slanting, flat surface
b. a rigid bar that rotates about a pivot called a fulcrum
c. an inclined plane wrapped around a cylinder
d. load is in the middle
e. two inclined planes placed back to back
f. a wheel turning around an axle inserted through its center
g. effort is in the middle
h. a circular lever that consists of a grooved wheel rotating about a hub
i. fulcrum is between the effort and load

A. any slanting, flat surface is an inclinded plane

B. a rigid bar that rotates about a pivot called a fulcrum is a lever

C. an inclined plane wrapped around a cylinder is a screw

D. load is in the middle of a second class lever

E. two inclined planes placed back to back form a wedge

F. a wheel turning around an axle inserted through its center
is cleverly labeled a "wheel and axle".

G. effort is in the middle of a third class lever

H. a circular lever that consists of a grooved wheel rotating
about a hub is a pulley

I. fulcrum is between the effort and load of a first class lever

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