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# velocity time graph watch

1. can anyone help me draw this graph..im stuck!

A car is being driven along a straight road at a steady 54km/h. It passes a motorcyclist at the side of the road. 5 s later the motorcyclist starts upand accelerates uniformly at 2ms-2 to a speed of 72km/h. He than continues at this speed until he catches up with the motorist. Draw a sketch of the velocity time graph for this motion.

Thanks
2. First off you need to change the 2ms-2 into km/h. The cars velocity will be a straight horizontal line. The motorcyclists will be 0ms-1 until 5s then it will be a slope with a positive gradient equivalent to 2ms-2 until it reaches 72kmh-1. The area under the graph is the displacement.
Hope this helps
3. http://www.stvincent.ac.uk/Resources...motgraphs.html
These show how the different parts of your graph should look and remember to label.
4. http://www.stvincent.ac.uk/Resources...motgraphs.html
These show how the different parts of your graph should look and remember to label.
5. (Original post by lincs_b)
First off you need to change the 2ms-2 into km/h. The cars velocity will be a straight horizontal line. The motorcyclists will be 0ms-1 until 5s then it will be a slope with a positive gradient equivalent to 2ms-2 until it reaches 72kmh-1. The area under the graph is the displacement.
Hope this helps

how do i change 2ms-2 into km/h??
6. 1 km = 1000m
1 h = 3600s

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