Quantitative Aptitude

Problems on Trains

989 Questions
All Passing a moving person or another train 430 Crossing a platform or bridge 379 Crossing a pole or stationary person 104 Meeting point and post-meeting times 52 Journey time, reduced speed, and schedule conditions 24

Problems on Trains Questions

Multiple choice

A train is moving slowly on a straight track with a constant speed of $2m/s.$ A passenger in that train starts walking at a steady speed of $2m/s$ to the back of the train in the opposite direction of the motion of the train so to an observer standing on the platform directly in from of that passengers, the velocity of the passenger appears to be:
  1. $4\;ms^{-1}$
  2. $2\;ms^{-1}$
  3. $4\;ms^{-1}$ in the opposite direction of the train

  4. zero
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The velocity of the passenger relative to the ground is the vector sum of the train's velocity and the passenger's velocity relative to the train. Since the train moves at 2 m/s and the passenger walks at 2 m/s in the opposite direction, the resultant velocity is 2 - 2 = 0 m/s.