Question

A 150m long train is going from east to west with velocity 20 ms. A bird flying to east with velocity 10 ms crosses the train. Find the time taken by bird to cross the train.

Answer 1

For Bird To Cross The Train Bird Must Travel The length of train

So

s=u(r)t+1/2at^2 (u(r)=Relative Velocity)

150=30t-1/2×gt^2

Solve For t.