1. Simple Machines
Chapter 6

2. How Do Simple Machines Help People Do Work?
Vocabulary: Lesson 1

3. the use of force to move an object over a distance
work simple machine
the use of force to move an object over a distance
a machine with few or no moving parts that you apply just one force to

4. lever – a simple machine made of a bar that pivots on a fixed point
fulcrum- the fixed point on a lever

5. How Do a Pulley and a Wheel-and-Axle Help People Do Work?
Vocabulary: Lesson 2

6. pulley wheel-and-axle
a simple machine made of a wheel with a line around it
a simple machine made of a wheel and an axle that turn together

7. How Do Other Simple Machines Help People Do Work?
Vocabulary: Lesson 3

8. a simple machine that is a slanted surface
inclined plane
a simple machine that is a slanted surface

9. a simple machine made of two inclined planes placed back-to-back
screw wedge
a simple machine made of a post with an inclined plane wrapped around it
a simple machine made of two inclined planes placed back-to-back

10. 6 Simple Machines
lever *
pulley
screw
fulcrum
inclined plane
wedge