Force - a push or a pull that acts on an object, measured in Newtons (N), Push - a force that acts on an object to move it away, Pull - a force that acts on an object to move it towards the pull’s origin, Contact force - a force applied by a body that is in contact with the object it is acting on, for example: friction, or pushing a toy car with your hand, Non-contact force - a force applied to an object by a body that is not in direct contact with it, for example: gravity or magnetism, Balanced force - is when the object will maintain its current state of motion, Unbalanced force - is when the object will change its state of motion. The object may speed up, slow down or change direction., Gravity - a force that pulls all objects towards the centre of the Earth, Friction - a force that opposes motion, Air resistance - A kind of friction (a force that opposes motion) which occurs between air and another object, Freebody diagram, Mass is - the amount of matter in an object, Weight is - the force that gravity acts on an object, Independent variable - is the variable that is changed in an experiment. For example, the surface area of parachutes, Dependent variable - is the variable that is measured in an experiment. For example, time in second in the parachute experiment, Control variables - are the variables in an experiment that are kept the same for each trial. For example, in parachutes - height of drop and egg weight, Fair Test is an experiment that is designed to have - an independent variable, dependent variable and control variables,

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