Movement and Position
This title considers motion. We will look at speed, and how it can be calculated using the speed equation. Measuring the distance of a journey and dividing this by the time it takes gives us the average speed. We will compare this with the 'instantaneous' speed reading as given by a car's speedometer. A journey can be represented by plotting a graph of distance against time. We will look at this, describing the different parts of it in detail. Acceleration is a vector defined as the rate of change in velocity, although in everyday life we think of acceleration as 'speeding up'. We will look at this more closely and try a few calculations. A graph of speed against time represents a journey in terms of acceleration. This graph will be examined and compared with graphs of distance against time.
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Curriculum and Exam Board Information
- Acceleration Equation
- Distance travelled from speed-time graphs
- DISTANCE, SPEED AND ACCELERATION
- Distance-time graphs
- Equal and opposite forces
- Friction - accelerating and retarding forces
- Ideas about forces and motion from Galileo and Newton
- Speed-time graphs
- The acceleration of a body is given by: acceleration (metre/second, m/s) = change in velocity (metre/second2 m/s2) / time taken for change (second, s)
- The area under a velocity-time graph represents distance travelled
- The slope of a distance-time graph represents speed. The velocity of a body is its speed in a given direction
- The slope of a velocity-time graph represents acceleration
- Velocity-Time Graphs
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