| A | B |
|---|
| Acceleration | A change in a moving object's speed or direction |
| Force | Anything that pushes or pulls on an object |
| Friction | A force caused by an object that acts in the opposite direction to the movement of another object |
| Gravity | The force of a large object that pulls smaller objects to it. |
| Inertia | The tendency of an object to keep moving if it is already moving or to stay at rest if it is already resting |
| Speed | Rate of motion |
| Unbalanced force | A force acting on an object that is not cancelled out by an opposite force |
| Velocity | The rate of motion in a particular direction |
| Newton's FIRST LAW | An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. |
| Newton's SECOND LAW | Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelaerate the object) |
| Newton's THIRD LAW | For every action there is an equal and opposite re-action |
| Sir Isaac Newton | Sir Isaac Newton was an English physicist, mathematician, astronomer, and a natural philosopher. He was born in England on December 25, 1642. He lived for 85 years (1642- 1727). |
