1. Scalars and vectors

2. What is a force? A force is a push, pull or twist.
This is a FLASH animation. Please click on the arrows to show the force.

3. Say if the following are pushes, pulls or twists:
Writing on paper
Typing on a keyboard
Tug-of-war
Unscrewing the top off a bottle
Posting a letter through a door
Putting on a pair of socks
Turning a door handle
Push
Pull
Twist
Push
Pull
Twist

4. Types of force you need to know……
Gravity
Friction
Air resistance
Magnetism
Tension
Electrostatic
Nuclear
Compression

5. Describing the forces Magnetism Friction Compression Tension
The force you get when two material rub together
The force you get when a material is being stretched
The force you get when a material is being squashed
The force that enables compasses to work
Magnetism
Friction
Compression
Tension

6. Describing the forces Gravity Nuclear Air resistance Electrostatic
The force that holds the particles in a nucleus together
The force you get when an object moves through air
The force that exists between all objects with mass
The force you get between two charged objects

7. Contact and non-contact
If two objects or materials need to be touching for the force to have an effect then it is a C________ force.
Examples:
If two objects or materials do not need to be t______ for the force to have an effect then it is a NON CONTACT force.
ONTACT
Friction
Air resistance
ouching
Gravity
Electrostatic
Magnetic

8. Gravity
Gravity is an attractive f____ that exists between all m_____. Gravity is always a_______.
The l____ the mass is, the greater the gravitational attraction. The f_____ away a mass is, the less the gravitational attraction.
Your w____ is the pull of the Earth’s gravity on your body.
If you stood on the M___ you would weigh less than on Earth.
This is because the Moon has less mass than Earth, so the Moon’s g_________ pull is weaker than the Earth’s.
orce
asses
ttractive
arger
urther
eight
The Moon is kept in orbit around the Earth due to gravity.
oon
ravitational

9. Supplement
Demonstrate an understanding of the difference between scalars and vectors and give common examples
Add vectors by graphical representation to determine a resultant
Determine graphically the resultant of two vectors

10. A scalar quantity only has Magnitude
Scalar quantities
A scalar quantity only has
Magnitude

11. Scalar quantities Energy Time Mass Volume Area Temperature Charge
Distance
Speed
Pressure
Density
Power

12. Vector quantities
A scalar quantity has
Magnitude
And direction

13. Vector quantities
Displacement
Velocity
Acceleration
Force
Momentum

14. To do
P46 & 47 Answer all questions