Motion - key points

Distance-time graphs (key points):
1. The distance-time graph for any object is:
  1. - Stationary is a horizontal line
  2. - Moving at constant speed is a straight line that slopes upwards
2. the gradient of a distance-time graph for an object represents the object's speed
3. Speed in metres per second, m/s =
  1. distance travelled in metres,m ------------------------------------------ time taken in seconds, s
Velocity and acceleration (key points)
1. Velocity is speed in a given direction
2. Acceleration is change of velocity per second. The unit of acceleration is the metre per second squared(m/s/s)
3. Accerleration =
  1. change of velocity -------------------- time taken
4. Deceleration is the change of velocity per second when an object slows down.
More about velocity-time graphs(key points)
1. If velocity-time graph is a horizontal line, they acceleration is zero.
2. The gradient of the line on a velocity-time graph represents acceleration
3. The area under the line on a velocity-time graph represents distance travelled
Using graphs (key points)
1. The speed of an object is given by the gradient of the line on its distance-time graph
2. The acceleration of an object is given by the gradient of the line on its velocity-time graph
3. The distance travelled by an object is given by the area under the line of its velocity-time graph

Zusammenfassung der Ressource

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