# P9 Motion

- Created by: Lucy Hart
- Created on: 20-01-20 19:27

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- P9 Motion
- P9.1 Speed + distance time graph
- distance = speed x time
- horizontal line = stationary
- constant speed = straight line sloping upwards

- P9.2 Velocity + acceleration
- velocity - speed in given direction
- moving around a circle, direction changes so constant speed but not constant velocity

- acceleration - change of velocity per second
- acceleration = change in velocity/time

- velocity - speed in given direction
- P9.3 Velocity time graphs
- motion sensor linked to computer can be used to measure velocity changes
- line goes up - velocity increases with time
- line is straight - increase in velocity the same every second (constant acceleration)
- horizontal line - constant velocity (acceleration = 0)

- line is straight - increase in velocity the same every second (constant acceleration)
- gradient = acceleration
- area under graph = distance travelled

- P9.4 Analysing motion graphs
- distance time graphs
- to find out speed at particular time or distance
- draw tangent to line
- draw triangle
- gradient of line = height of triangle (d)/ base of triangle (t)

- draw triangle

- draw tangent to line

- to find out speed at particular time or distance

- distance time graphs

- P9.1 Speed + distance time graph

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