Friction can be friend or foe. What is friction, how does it affect our lives and how can we alter it?
- Friction is a resistive force between surfaces moving at different velocities.
- Friction is affected by smoothness, stickiness and lubrication.
- Drag is a type of friction that occurs when a solid object moves through a fluid substance.
- On the Moon there is no air to cause friction.
Without friction, holding things would be difficult, walking would be impossible and car brakes would simply not work.
Friction occurs whenever two surfaces come together while moving at different velocities.
It is a force that opposes motion.
So even without brakes, cars do eventually stop – due to the friction of ...
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