Tuesday 8 March 2016

1.6 plot and interpret velocity-time graphs

Interpreting the graph...

straight line = constant speed
straight line going upwards = steady, constant, increase in velocity (constant acceleration)
straight line going downward = steady, constant, decrease in velocity (constant deceleration)
curved line = changing acceleration
straight line at base of graph = stationary (no velocity)
The steeper the slope, the faster the acceleration/deceleration

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.


In the example above...
The object is stationary for the first 3 seconds, then has a steadily increasing speed for 2 seconds. For the next 3 seconds it has a constant speed, and for the last 2 seconds it has a steadily decreasing speed.

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2 comments:

  1. Unknown9 April 2018 at 08:30

    this is wrong

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    1. Millie9 April 2018 at 09:27

      no it's not lol, are you sure you read it correctly? I can explain in a simpler way if you'd like

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