Motion

Distance-time graphs:

• The slope in a distance-time graph represents speed.
• Speed (m/s) = distance (m) / time (s) 

• The steeper the line on a distance-time graph, the greater the speed it represents.

Summary questions:

• The unit of speed is the metre/second.
• An object moving at a steady speed, travels the same distance every second.
• Speed= distance / time

                   = 1800 / 60

                   = 30 m/s

Velocity and Acceleration:

• Velocity is speed in a given direction.
• Acceleration is the change in velocity per second.
• A body travelling at a steady speed is accelerating if its direction is changing.
• Acceleration…