Laws of motion - describing motion

distance

a measurement of how far or how near things are to one another

displacement

distance and direction of an objects change in position from the starting point

speed

a measure of how fast something is moving

average speed

how fast an object moves over a certain distance and period of time

instantaneous speed

the speed of an object at one instant of time

average speed formula

distance / time (d/t)

calculating distance formula

speed x time (d = v x t)

calculating time formula

distance/speed (t = d/v)

displacement - time graph

a motion graph showing displacement against time for a given body

gradient

the slope of the graph

calculating gradient

rise/run (rise over run)

speed-time graph

shows the speed of an object over time

increasing speed graph

curve upwards

decreasing speed graph

curve downwards

constant speed graph

straight line

variables

quantity whose value can change

SI units

international system of units