Distance, speed and acceleration
- Created by: Nadia
- Created on: 20-12-12 16:05
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- distance, speed and acceleration
- Speed is a measure of how fast an object/ animal is moving
- speed=distance (m) / time (s)
- speed is a scalar quantity (only has magnitude)
- Velocity is a vector and has direction as well as magnitude
- velocity is measured in metres per second, in a specified direction
- on distance-time graphs stationary objects are shown by flat straight lines
- objects travelling at constant velocity are shown by straight sloping lines
- the speed of an object can be found by measuringthe gradient of the graph
- acceleration is the rate of change of velocity
- objectsgoing faster are accelerating, objectsgoing slower are decelerating
- units of acceleration are m/s^2
- on velocity-time graphs objects travelling at constant velocity are shown by straight lines
- a straight line sloping downwards indicates an object decelerating
- the acceleration can be found by measuringthe gradient of the velocity-time graph
- the area under the graph is the distance travelled
- Speed is a measure of how fast an object/ animal is moving
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