# Physics

- Created by: michelletran
- Created on: 22-10-14 16:09

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- Physics
- Speed (Distance time graphs)
- Measure of how far an object moves in a given time
- Average speed= Distance travelled/Time taken

- Velocity (Velocity time graphs)
- The speed and direction in which an object is moving
- Area under the line= Distance travelled
- To work out area of triangle on graph: Base x Height/2
- Gradient of line= Acceleration

- Acceleration
- Measure of how quick its velocity changes
- De/Acceleration= Change in speed/Time
- Change in speed (m/s)
- Time taken (s)
- Acceleration (m/s 2)

- Forces
- Reaction force
- Upwards force

- Resultant force
- The force that is left when you add all the forces acting on an object
- If forces are balanced, speed and direction of object will remain
- If forces are unbalanced, speed and direction of object may change

- Force= Mass x Acceleration
- Mass (kg)
- Force (N)

- Reaction force
- Weight
- Weight= Mass x Gravitational field strength
- Weight (N)
- Gravitational field strength (N/kg)

- Weight= Mass x Gravitational field strength
- Terminal velocity
- Top speed reached when there is no resultant force

- Speed (Distance time graphs)

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