A train of 150m length is going towards north at a speed of 10 m/s. a parrot flies at a speed of 5 m/s towards south parallel to tailway track. the time taken by parrot to cross the train is equal to?
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Answer:The Velocity vector of train = 10 j cap because its going towards north.
the Velocity vector of parrot= -5 j cap
=the relative velocity of train with respect to parrot =[10j - (-5j)]
=Vt p=15j
therefore distance S= 150
time = S/Vt p
=150/15
t=10s
Therefore time taken by parrot to cross the train is equal to 10 secs.
Hope the answer was helpful
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