DRAG, force which slows the movement of an object through a liquid or gas, AIR RESISTANCE, force that tends to slow the movement of an object through a gas, BOUYANCY, the upwards force exerted by any fluid on a mass placed upon it, FRICTION, force between 2 surfaces when they are sliding, or trying to slide, over one another, GRAVITY, The force that pulls all mass down towards the centre of the planet, NORMAL, the force that supports you when you are sitting or standing on anything, TENSION, a force that happens when an object is pulled tight by forces acting on opposite ends, THRUST, The engine force! This force is the one that most often makes objects move, NEWTON, Units a force is measured in, BALANCED, if forces are opposite in direction and equal in size they are..., STATIONARY, When all forces are balanced and the object is not moving, ACCELERATING, When thrust force is increased and is larger than drag it..., DECELERATING, When forces are applied to slow an object down it is..., EQUILIBRIUM, When forces are perfectly balanced they are at..., WEIGHT, The force on a mass because of gravity, MAGNETISM, Iron, nickel and cobalt can all be examples of..., MASS, A measure of the amount of matter in an object, PIVOT, The point a lever will rotate about, MOMENT, Turning effect of a force, WORK, This is done when a force causes an object to move.

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