Motion

• Equation

  Speed = distance/time
• To calculate speed you need to know the distance and the time.
• To calculate average speed you divide the distance travelled by the time spent.
•  You measure speed relative to a stationary object.
• Distance-time graphs

  shows the distance that an object travels in a certain time. The curve of the line tells you the speed. If the line is horizontal the object is stationary. If the line is a curve the speed of the object is accelerating.