The distance - time graph of two trains A and B are given. The trains start simultaneously in
the same direction
(a) How much ahead of A is B when the motion starts?
(b) What is the speed of B?
(c) When and where will A catch B?
(d) What is the difference between the speeds of A and B?
(e) Is the speed of both the trains uniform or non-uniform ? Justify your answer.
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ANSWER
b'1. B is 100 km ahead of A.
2. speed of B =
PR
QR
=
2−0
150−100
=25Km/h
3. A will catch B at point Q after 2hrs and at a distance of 150Km.
4. speed of A=
OS
QS
=
2−0
150−0
=75Km/h
speed of B =25Km/h
so, the difference is 50Km/h
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