A train is traveling at a constant speed. The diagram represents the train's distance and time. What is the speed of the train?
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11th
Physics
Motion in a Straight Line
Speed and Velocity
The graph represents the mo...
PHYSICS
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Asked on December 26, 2019 by
Prabh Pannerselvam
The graph represents the motion of a train travelling between two stations.
Which statement about the train is correct?
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ANSWER
Total journey is area under the graph = Area of increasing speed + area of constant speed + area of decreasing speed
=
2
1
×100×20+400×20+
2
1
×400×20
=1000+8000+4000=13000
Train travels for 1000km in 100s which is the acceleration part.
it travels with constant speed for 8000m
Trains is accelerated for 100s and decelerates for 400s, so decelerating take more time.
Train travels with constant speed for 400s than less than half of total journey time of 1000s
Option B is correct