📖 Science glossary A–Z
Child-friendly definitions with examples, pronunciation, and Chinese (中文) and Malay (Bahasa Melayu) translations where helpful.
💪 Force /forss/ · 力 · daya
A push or a pull — that is all a force is!
A push or a pull that can change how something moves.
Example: Kicking a ball, opening a door and squeezing a sponge all use forces. · Related: push, pull, friction
🛑 Friction /FRIK-shun/ · 摩擦力 · geseran
The rub that slows things down.
A force that slows things down when they rub together.
Example: Bicycle brakes use friction to stop the wheels. · Related: force, surface