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# A train travelling at 20km/hr is approaching a platform .A bird is sitting on a pole on the pole on the platform.When the train is at a distance of 2km from pole,brakes are applied which which produce a uniform deceleration in it.At instant the bird flies towards the train at 60km/hr and after touching the nearest pt on the train flies back to the pole and then flies towards the train and continues repeating itself.Calculate how much distance will the bird have flown before the train stops?e is approachi

Asked by m.nilu 20th July 2018, 9:49 PM
Step 1 : Fnding the acceleration of the train when it is at the distance of 2 km from the pole.

final velocity 'v' is 0 because it is assumed that the train is supposed to stop when it reaches the pole.
initial velocity = 20 km/hr ...(given)
s = 2 km, the distance of the train from the pole.

Step 2: Finding the time in which the train travelled 2kms to the pole.

Step 3: Finding the distance that the bird covers in the above period of time.

distance = speed (of bird) x time (above calculated)

Answered by Expert 26th July 2018, 12:37 PM
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