Friction
Physics: Edexcel IGCSE, topic 1.2.3
Friction and Air Resistance
Friction is the force created by two surfaces rubbing against each other. It opposes motion and often causes heating.
Friction
- Friction opposes motion and often causes heating.
- Separating two surfaces with a thin layer of oil can reduce friction and allow them to move more freely across each other.
- Fidget spinners reduce friction to the lowest level possible to let them spin for as long as possible.
Air resistance
- Air resistance is a frictional force.
- It opposes an object's motion.
Test yourself on Friction
What does friction often cause between two surfaces?
Which of these statements is true?
Which of the following is not a way of reducing friction?