Force - A push, pull or twist applied to one object by another object., Contact Force - Directly touches the object they are pushing or pulling, Non-Contact Force - Invisible forces that do not touch the objects that they are pushing or pulling, Balanced Forces - Where the effect of one force is cancelled out by another., Unbalanced - Forces that are not equal in size and may or may not act in the same direction, Newtons (N) - The units used to measure forces, Mass - The amount of matter in an object, measured in kilograms (kg), Weight - The force acting on an object due to gravity, Gravity - The force that attracts a body towards the centre of the earth, or towards any other physical body having mass, Force Diagram - An image showing the direction and size of forces, Friction - A force that exists between two touching surfaces, Magnetism - The force exerted by magnets when they attract or repel each other, Air Resistance - The force acting on an object that is moving through air flowing in the opposite direction,

Friction & Magnets

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