Kinematics Question 385
Question: A train of 150 m length it’s going towards north direction at a speed of $ 10m{{s}^{-1}} $ . A parrot flies at a speed of $ 5m{{s}^{-1}} $ towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to
Options:
A) 12s
B) 8s
C) 15s
D) 16s
Show Answer
Answer:
Correct Answer: D
Solution:
The velocity of parrot w.r.t. train it’s S $ =5-(-10)15m/sec $
so time taken to cross the train it’s = $ \frac{\text{length of train}}{\text{relative velocity}}=\frac{150}{15}=10\text{ sec} $
