1. FORCE AND MOTION

2. NEWTON’S LAWS OF MOTION
- Established the relationship between motion and force

3. FIRST LAW – LAW OF INERTIA
Every object tends to remain at rest or move with a constant velocity unless acted upon by a net force.
NET FORCE – summation of all forces acting on a given body
INERTIA – measure of the mass of an object
Examples:
a. Passenger tends to move forward when a car suddenly stops.
b. A moving car in uniform motion slows down when the brake is applied.

4. FIRST LAW – LAW OF INERTIA
This means that in theory an object can travel FOREVER.
However, in practice there would always be some friction to slow it down. v v

5. Force is either a push or pull

6. SECOND LAW LAW OF ACCELERATION
The acceleration (a) of a body is directly proportional and in the same direction as the net force (F) applied to it and inversely proportional to the mass (m).
a (m/s2) = Force (kg-m/s2)
mass (kg)
Unit of force = 1 newton (N) = kg-m/s2

7. SECOND LAW LAW OF ACCELERATIONm

8. SECOND LAW LAW OF ACCELERATIONm
An increase in force will produce an increase in acceleration.

9. SECOND LAW LAW OF ACCELERATIONm
An increase in mass will produce less acceleration (for the same amount of force).

10. THIRD LAW LAW OF INTERACTION
For every action, there is an equal but opposite reaction.
When a force is applied to an object, the object exerts a force that has the same magnitude but opposite in direction.
These are called action-reaction forces.

11. THIRD LAW LAW OF INTERACTION

12. THIRD LAW LAW OF INTERACTION
A rocket motor
A reaction force acts on the exhaust Gases
gives a thrust or force on the rocket, accelerating it forward.