Kinematics Question 309

Question: A 210 meter long train is moving due North at a of 25m/s. A small bird it’s flying due South a little above the train with speed 5m/s. The time taken by the bird to cross the train it’s [AMU (Med.) 2001]

Options:

A) 6s

B) 7s

C) 9s

D) 10s

Show Answer

Answer:

Correct Answer: B

Solution:

Relative velocity of bird w.r.t train =25+5=30 m/s time taken by the bird to cross the train t=21030=7 sec



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