A train of 150 metre length is going towards north direction at a speed of 10 m/s. A parrot flies at the speed of 5 m/s towards south direction parallel to the railways track. The time taken by the p…

Question

A train of 150 metre length is going towards north direction at a speed of 10 m/s. A parrot flies at the speed of 5 m/s towards south direction parallel to the railways track. The time taken by the parrot to cross the train is

Accepted Answer

Correct answer: D. (d) Choose the positive direction of x‐axis to be from south to north. Then Velocity of train v_T=+1 0 m s^−1 Velocity of parrot v_P=−5 m s^−1 Relative velocity of parrot with respect to train =v_P−v_T=_(−5 m s^−1_)−_(+1 0 m s^−1_)=−1 5 m s^−1 i.e. parrot appears to move with a speed of 15 m s^−1 from north to south Time taken by parrot to cross the train = 1 5 0 m1 5 m s^−1=1 0 s

$A train of 150 metre length is going towards north direction at a speed of 10 m / s . A parrot flies at the speed of 5 m / s towards south direction parallel to the railways track. The time taken by the parrot to cross the train is$

Solution

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