GCSE PHYSICS - Velocity Time Graphs for Constant Negative Acceleration and Changing Acceleration

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Velocity - Time Graphs for
Constant Negative Acceleration and Changing Acceleration.

The picture below shows a velocity - time graph
for an object with a velocity that decreases at a constant rate.

Velocity - Time Graph Showing Constant Deceleration

The straight line sloping downwards in the graph above
shows that the objects velocity is decreasing as time goes by.
This is called negative acceleration.

The straight line shows that it is constant negative acceleration.
The slope of the line shows
1. the acceleration is negative because the line slopes downwards
2. how fast the negative acceleration is.
The greater the slope, the faster the acceleration is.

The picture below shows a velocity - time graph
for an object with an acceleration that increases.

Velocity - Time Graph Showing Changing Acceleration

The curve in the above graph shows that the
acceleration is not constant because the slope is getting steeper.
It is changing acceleration that increases as time goes by.

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