Do Now
1. What is a force?
2. How is the car able to move and stop?
3. What is keeping it on the ground?
Forces
Forces can push things
Forces can pull things
Forces can twist and turn things
Forces
• Forces can change the speed, direction or shape of an object – they are
measured in Newton's (N)
• Every action has an equal and opposite reaction – If you push on
something (action) it pushes back (reaction).
This is known as Newton's 3rd law
This is Isaac
Newton
Pushing/Pulling Force
Kinetic Force is defined as movement of an object or thing e.g. kicking
a football.
Gravity Force
Gravity/Weight Force is the attraction between two objects with mass
e.g. orbit of moon with earth
If you kick a football and there's no gravity what happens to the
football?
Magnetic Force
Magnetic – is a force experienced by certain metals like iron, cobalt and
steel.
Friction/Drag Force
• Friction/Drag – This is the force that is responsible for slowing down a
car when it breaks or why its difficult to move something heavy across
the carpet.
• It occurs between 2 solid surfaces.
Spring Elastic Force
Spring/Elastic force is the force exerted by a compressed or stretched
spring upon any object that is attached to it
Answer the questions on the worksheet as you watch the video.
We can show the forces that are acting on
something using arrows
The arrows show us which direction the
force is going in.
True or False
1. Gravity is the force that describes two objects sliding against each
other
2. Every action has an equal and opposite reaction
3. If a tree falls down, magnetic energy is the force pulling it to the
ground
4. Gravity and Friction are acting on you when sliding down a water
slide
5. When you kick a football the force that acts on it is kinetic