SOLUTION: a train strays from rest and accelerate at 2ms-2 for10 secs and the velocity reached is maintained for the next 20secs before coming to next 20secs before coming to rest in de next

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Question 1091483: a train strays from rest and accelerate at 2ms-2 for10 secs and the velocity reached is maintained for the next 20secs before coming to next 20secs before coming to rest in de next 10secs...draw the velocity time graph of the motion and calculate the total distance covered by train
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
At t=0, v=0.
At t=10,v=at=2%2810%29=20m%2Fs.
At t=30,v=20m%2Fs.
At t=40,v=0.
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The distance covered is equal to the area under the velocity vs time graph.
Find the area of the two triangles and one rectangle.
A=2%2A%281%2F2%29%2810%29%2820%29%2B%2820%29%2820%29
A=200%2B400
A=600m