1. Vocabulary for Simple Machines
Study these terms for your vocabulary test.

2. Force
force- a push that moves an object away or a pull that moves an object near

3. Friction
friction- a force that slows or stops motion between two surfaces that are touching

4. Gravity
gravity- the force that pulls bodies or objects toward other bodies or objects

5. Inclined Plane
inclined plane- a simple machine made up of a slanted surface

6. Lever
lever- a simple machine made up of a stiff bar that moves freely around a fixed point

7. Motion
motion- a change in an object’s position as compared to objects around it

8. Position
position- an object’s location, or place

9. Pulley
pulley- a simple machine made up of a rope fitted around the rim of a fixed wheel

10. Screw
screw- a simple machine made up of an inclined plane wrapped around a column

11. Simple Machine
simple machine- a device that changes a force

12. Speed
speed- a measure of the distance an object travels in a certain amount of time

13. Velocity
velocity- a measure of speed in a certain direction

14. Wedge
wedge- a simple machine made up of two inclined planes

15. Wheel and Axle
wheel and axle- a simple machine made up of two cylinders that turn on the same axis