Force and Motion

1
Force and Motion

• Unit 2

2
Force

• A push or a pull

3
Inclined plane

• A simple machine that is a flat surface with one
  end higher than the other

4
Speed

• The distance an object moves in a given amount of
  time

5
Motion

• A change in the position of an object as it is
  moving

6
Friction

• A force that slows down a moving object when it
  rubs against another object

7
Magnet

• An object that pulls objects made from iron
  toward it

8
Pole

• One of the two ends of a magnet where the pull is
  the strongest

9
Attract

• To pull toward- unlike poles on a magnet attract
  each other

10
Repel

• To push away-like poles on a magnet repel each
  other

11
Magnetic Field

• All of the invisible magnetic forces around a
  magnet

12
Gravity

• A force that attracts objects to each other. The
  force of gravity holds you to Earth.

13
Simple Machine

• A machine that makes work easier
• Has few or no moving parts

14
Wedge

• A simple machine made of two inclined planes
  joined together
• Example an ax

15
Lever

• A simple machine made of a bar that moves on a
  fixed point
• Example a crowbar

16
Pulley

• A simple machine made up of a wheel with a rope
  around it
• Lifts heavy objects

17
Wheel and Axle

• A simple machine made up of a wheel with a rod
  going through the center
• Example skates, cars

18
Screw

• A simple machine with ridges or threads that wrap
  around a rod
• Examples a drill