1. Force and Motion

2. Mass The amount of matter something has Measured in kilograms (kg)
Inertial mass is a quantitative measure of an object's resistance to changes in velocity.
Gravitational mass is a quantitative measure that is proportional to the magnitude of the gravitational force

3. Motion A change in position relative to a reference time
Distance – entire path travelled or how far an item has moved from its starting point as an accumulative value
Measured in meters
Displacement – distance and direction of the objects final position to its initial position
Vectors are used to represent the size and direction of displacement

4. How fast something is moving per unit of time
Can be measured in two ways
Instantaneous – given moment (radar)
Average – how quickly an object moved over the entire distance (calculated)
Distance travelled / time
Measured in meters/second (m/s)

5. Speed and direction of motion
Distance / time with direction
5 m/s, north
5 m/s (vectors can be used to show direction)

6. Forces A push or pull on an object by another object
Cause of acceleration
Measured in Newtons (N)
Forces video

7. Friction Type of force that opposes a moving object
Depends on the roughness of a surface

8. Acceleration Change in velocity over a period in time
Positive – speeding up
Negative – slowing down
Calculated by (final velocity – initial velocity) / (Final time - initial time)
Measured in m/s2

9. Type of acceleration
Created when two large objects are attracted to each other
The earth’s pull on an object
9.81 m/s2

10. Newton’s laws of motion
Intro rap

11. Newton’s 1st law of motion
Inertia
An object moving in a straight line will continue to move in a straight line unless acted upon by another force
An object will stay at rest unless acted upon by another force

12. Newton’s 1st law of motion
Examples:
When riding a horse, the horse suddenly stops and you fly over its head
The magician pulls the tablecloth out from under a table full of dishes
1st law video

13. Newton’s 2nd law of motion
Focuses on the relationship between mass, acceleration and force of an object
Force = mass x acceleration
Measured in – Newtons (N) = kg X m/s2
In a vehicle, the net external force on a passenger's body is the mass of the vehicle multiplied by its acceleration, so what happens to the person without a seatbelt?
Importance of seatbelt

14. Newton’s 3rd law of motion
When one body exerts a force on a second body, the second body simultaneously exerts a force equal and opposite in direction to that of the first body
Examples
Guns being fired - why they kick in proportion to the size of the bullet
Walking
Billiards
Jumping out of a boat onto the dock

15. Review Newton’s 3 laws of motion

16. Momentum = mass X velocity
P = MV
Increases when the mass or velocity increases
An object at rest does not have momentum, no matter how large it is.
Momentum and inertia are not the same

17. Conservation of momentum
The total momentum of two objects before the collision is equal to the total momentum of the two objects after the collision

18. Conservation of momentum
If one ball stops dead after the collision, the other ball will continue away with all the momentum. If the moving ball continues or is deflected then both balls will carry a portion of the momentum from the collision

19. Roller Coasters Kinetic and potential energy in a roller coaster
Roller coaster video
Roller coaster simulation