P3 - A
- Created by: zoolouise
- Created on: 02-06-15 18:52
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- Speed
- Measuring speed
- Speed = distance/time
- We write 'average' speed as the speed changes throughout a car journey.
- The speed of a car at a certain point is called instantaneous speed
- Distance traveled = average speed x time
- Increasing the speed means increasing the distance traveled in the same time. increasing the speed reduces the time needed to cover the same distance.
- Distance-time graphs
- Distance-time graphs allow a collection of data to be shown. It's easier to interpret data when they are plotted on a graph than when they're listed in a table
- The gradient of a distance-time graph tells you about the speed of the object. A higher speed means a stepper gradient.
- Speed is equal to the gradient of a distance-time graph
- Gradient = y/x
- A straight line shows that the speed is constant.
- A curved line shows that the speed is changing.
- Measuring speed
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