A 150 m long train is moving north at a speed of 20 m/s. A bird flying south at a speed of 5 m/s crosses the train. What is the time taken by the bird to cross the train?
Answers
Answered by
1
Answer:
Let,
velocity of train (v
t
)=−20m/s
velocity of bird (v
b
)=5m/s
separation at t=0s=150m
Then,
velocity of bird wrt train (v
b/t
)=v
b
−v
t
=5−(−20)=25m/s
let t be the time taken to cross.
Then,
t=
v
b/t
150m
=
25m/s
150m
=6s
Attachments:
Similar questions