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Forces
The earth pulls you down
When you dive in the pool or ocean, the water pushes against your skin
When you drive fast, the car seat pushes into your back
Your enemy may push you to the ground, but your friend will pull you back up to your feet
If your walk you dog, and he is strong and fast, like Luka, then you will be pulled along
A truck pulls a trailer
A bulldozer pushes the soil
A digger pushes its bucket. When the bucket is tipped, the earths gravity pulls the soil to the ground
So Forces push or they pull.
A Force is a Push or a Pull
Force
Force
Forces are a push or a pull
Forces cause things to move.
When a Force is applied to a thing it might
Change direction
Change velocity
Change shape
Force can only cause movement if it is unbalanced
A Balanced force is like you leaning on a wall
A Unbalanced force is like the Hulk leaning on a wall and it tips over
Movement will only happen if the Force is Unbalanced
Balanced Forces = like tug of war and there is no movement
Unbalanced = tug of war and one side wins
Force in Newtons
Force in Newtons
The unit for Force is named after the person that dedicated his life to the study and exploration of physics - Newton
Contact vs Non Contact Forces
Contact vs Non Contact Forces
Although a force is a push or a pull. The force doesn't need to be touching!
When you push on a toy truck to move it - this is contact - so its a contact force
When you use a magnet to push the truck around you are not touching the truck, this is non-contact
Contact forces are whenever two things are touching. This includes
Friction
Air friction and water friction - Drag
Tension - springs, rope, rubber band, slingshot
Support or Normal force (the force of the ground)
Thrust
Buoyancy (in air or water)
Non-contact forces are forces that don't touch. This includes
Magnets
Electrostatic force - this is what causes your hair to raise up with a balloon
Gravity
Watch this GCSE Physics clip, it is really good!
Friction Force
Friction Force
Force Vectors
Force Vectors
Force = Mass x Acceleration
Force = Mass x Acceleration
Newtons laws
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