Question:
A train is running towards east with a speed 20 m/s. A man on the train is running towards east with speed 4 m/s relative to the train. The velocity of man relative to ground?
Answer:
Speed of the train = 20 m/s
Let us assume the speed of the man to be x m/s
Both the train and the man are moving in the same direction.
So, according to the question, (20 - x) = 4
Therefore, x = 20 - 4
x = 16 m/s
So the man is moving with a speed of 16 m/s relative to the ground.
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