A 150m long train is moving to north at a speed of 10m/s. A parrot flying towards south with a speed of 5m/s crosses the train. Calculate the time taken by the parrot to cross the train.
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answer is 10s.
Distance to be covered by the parrot=150m
speed of train=10m/s
speed of parrot=5m/s
now consider the train with respect to parrot and not with respect to land.
velocity of parrot=5
velocity of train=-10(∵the train is in opposite direction)
so relative velocity of train w r t parrot = 5 - (-10) =15m/s
now time = distance/speed = 150/15= 10s
Distance to be covered by the parrot=150m
speed of train=10m/s
speed of parrot=5m/s
now consider the train with respect to parrot and not with respect to land.
velocity of parrot=5
velocity of train=-10(∵the train is in opposite direction)
so relative velocity of train w r t parrot = 5 - (-10) =15m/s
now time = distance/speed = 150/15= 10s
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