Richards, Jon, 1970-

Work & simple machines / Work and simple machines Jon Richards. - Brookfield, CT : Copper Beech Books, 2000. - 31 p. : col. ill. ; 29 cm. - Science factory .

Uses simple experiments to explore wheels, pulleys, levers, friction, and lift in terms of inventions and discoveries underlying the modern mechanical world.

ISBN: 0761311599 (lib. bdg.)

LCCN: 99058085

Subjects--Topical Terms:
Simple machines.
Force and energy.
Simple machines--Experiments.
Force and energy--Experiments.
Experiments.

LC Class. No.: TJ147 / .R53 2000

Dewey Class. No.: 621.8/11