Friction 1
Science: KS3, topic 3.2.12
Friction
Two objects rub or slide together. Friction is the force that slows the objects down.
Friction
- Friction is the force when two objects rub together or slide past each other.
- When you walk, there is friction between your shoes and the ground.
Thermal energy
- Friction makes thermal energy.
- The energy is often lost to the object's surroundings.
Air resistance
- Air resistance is a type of friction.
- You can reduce air resistance by streamlining an object so it is more aerodynamic.
Useful friction
- The soles of your shoes have worn out and there is no grip.
- Worn soles with no grip reduce friction.
- You put oil on your bike chain to reduce friction around the chain and gears.
Snow chains
- Snow chains are used on tyres.
- The chains increase friction between a car's wheel and a snow-covered road.
- The chains prevent the car from skidding.
Test yourself on Friction 1
Which of these is NOT an example of friction?
Which of these are examples of friction?
Which of these is NOT an example of useful friction?