pascal - Unit of pressure, acceleration - rate of change of velocity, instantaneous - speed over a very short period of time, terminal - velocity of an object when the driving force can no longer overcome the resisitive force, newton - unit - when 1kg is accelerated by 1m/s squared, mass - F=ma can't be used for particles travelling near speed of light because ....... increases, drag - An object travelling in a fluid will experience ......., resultant - An object will travel at a constant speed if the .......... force is zero, surface area - The amount of drag on an object will depend on fluid viscosity, its velocity and ........... .........., centre of gravity - Point where entire weight of object appears to act, couple - a pair of forces that tend to produce rotation only, equilibrium - Net force and net moment is zero, trilateration - GPS uses this method, work done - Force x distance moved in direction of force, power - rate of work done, watt - Transfer of one joule in one second,

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