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forces
A Coggle Diagram about weight & mass (weight, mass, the amount of matter in an object , measured in Kg's , force, measured in newtons, w= mass x gravity , weight changes depending which planet you are on and mass always stays the same no matter where you are ), push/pull/twist (non-contact, contact force, gravity, magnet, drag/air resistance, thrust , weight and support/lift), balanced vs unbalanced forces and Friction (friction occurs when two objects slide over another, this is because no surface is completely smooth, heat is produced , friction is good: eg. tires on road;grip on handles, friction is bad; e.g. chains rusting: can't work, chaffing on legs and the bigger the force= the greater the friction between the surfaces trying to slide over each other )