Force - An interaction which can change the motion of an object., Gravity - The force which causes things to drop to the ground., Air resistance - A force that slows things down that are moving through air., Water resistance - A force that slows things down that are moving through water., Friction - The force that makes it difficult for things to move freely when they are touching each other., Mass - A measure of the amount of matter in an object (measured in grams and kilograms). Remains the same whether you are on Earth or in Space. , Weight - The force of gravity on an object. This changes depending on if you are on Earth or in Space., Gears - A toothed wheel that works with others to increase speed., Pulleys - A machine with a wheel and a fixed axle (pin)., Fulcrum - The point where a lever turns., Lever - A rigid bar that rests on a fulcrum. It is used to lift/move heavy objects.,

Year 5 Forces - Key Vocabulary

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