Kinematics Question 307
Question: Two trains, each 50 m long are travelling in opposite direction with velocity 10 m/s and 15 m/s. The time of crossing it’s [CPMT 1999; JIPMER 2000; RPET 2001]
Options:
A) $ 2s $
B) $ 4s $
C) $ 2\sqrt{3}s $
D) $ t=\frac{{\nu _{1}}-{\nu _{2}}}{a} $
Show Answer
Answer:
Correct Answer: B
Solution:
Time $ =\frac{\text{Total length }}{\text{Relative velocity }}=\frac{50+50}{10+15}=\frac{100}{25}=4\ sec $
