Thursday, 21 February 2013

1.7 determine acceleration from the gradient of a velocity-time graph

Acceleration is measured in meters per second per second: m/s/s or m/s².
This means we need to find out how many m/s are travelled every s.
Which  is the same as change in velocity over time.
We can work this out by looking at a time period in the graph and seeing how much the velocity changes. For example on this graph between second 3 and second 4 the velocity changes from 0 to 4: meaning that it changes 4 m/s every 1s
4/1= 4m/s²
So effectively you do up divided by across to give acceleration.
Velocity-time graph. Velocity in metres/second is on the vertical (y) axis and time in seconds in on the horizontal (x) axis. The line goes straight from 0 to 3 seconds on the x axis. the the object speeds up and it's velocity increases from 0 to 8 m/s in 2 seconds. The speed remains constant at 8 m/s for 3 seconds, before decreasing back to 0 in 2 seconds.(bbc)


  1. This comment has been removed by the author.

    Has copied your notes

    1. Thank you so much, I really appreciate you pointing this out, I will look into it!!

  3. 'Rise over Run' is a good way to remember it

  4. Aceleration Unit Converter,Quick and easy tool for converting acceleration units. You can convert units like: km/s², m/s², mm/s², milla per second squared, ft/s², in/s² and others