Question

a train is one50 meter length is going to wards north direction at a speed of ten m\s a parrot flies at the speed of 5m\s towards south direction perellar to the railways track.the time taken by the parrot to cross the train is.​

Answer 1

Answer:

Explanation:

using relative velocity formula find the relative velocity of parrot with respect to train.

lets take velocity of parrot be$v_{A}$

lets take velocity of train be $v_{B}$

$v_{AB} = v_{A} - v_{B}$

⇒ $v_{AB}$ = 5 - (-10)                           ∵ the train is moving in opposite direction

⇒ $v_{AB}$ = 5 + 10

⇒ $v_{AB}$ = 15

length of train 150 m

$time taken = \frac{distance}{speed}$

⇒   $time taken = \frac{150}{15\\}$

⇒   $time taken = 10 s$

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