Distance-Time Graphs | Physics for GCSE/IGCSE - Year 11 PDF Download

Distance-Time Graphs

A graph depicting how the distance of an object, moving linearly from a starting point, changes with time.

Constant Speed on a Distance-Time Graph

• Distance-time graphs also provide the following details:
• They indicate if the object is moving at a constant speed and the magnitude of that speed.
• They reveal whether the object is moving at a constant pace.
• A straight line on a distance-time graph signifies constant speed.
• The steepness of the line indicates the speed of the object:
  • A very steep slope suggests the object is moving quickly.
  • A gentle slope indicates the object is moving slowly.
  • A flat, horizontal line shows that the object is stationary. (not moving) 

This graph illustrates how the slope of a line on a distance-time graph reveals the speed of moving objects. Objects moving at a constant speed will result in straight lines on the graph.

Objects Moving at Changing Speeds:

• This occurs when objects move at varying speeds, depicted by curves on a graph.

Slope Variation Indicates Speed Change:

• When the slope of a line changes, it signifies a change in speed.
• If the slope increases, the speed accelerates. Conversely, if it decreases, the speed decelerates.
• The illustration below displays two distinct objects in motion with varying velocities:

Using Distance-Time Graphs

• The speed of an object in motion can be determined by examining the slope of the line on a distance-time graph.

• The ascent represents alterations in y (distance) measurements.
• The horizontal movement signifies adjustments in x (time) values.