The lever /
Armentrout, Patricia,
The lever / Patricia Armentrout. - Vero Beach, Fla. : Rourke Press, c1997. - 24 p. : col. ill. ; - Simple devices .
Includes index.
Text and pictures introduce the lever, a simple machine used to change force and motion.
1571031774
Levers
Lifting and carrying
Levers.
621.8
The lever / Patricia Armentrout. - Vero Beach, Fla. : Rourke Press, c1997. - 24 p. : col. ill. ; - Simple devices .
Includes index.
Text and pictures introduce the lever, a simple machine used to change force and motion.
1571031774
Levers
Lifting and carrying
Levers.
621.8