Laws Of Motion Question 410
Question: Two trains A and B are running in the same direction on parallel tracks such that A is faster than B. If packets of equal weight are exchanged between the two, then
Options:
A) A will be retarded but B will be accelerated
B) A will be accelerated but B will be retarded
C) there will be no change in velocity of A but B will be accelerated
D) there will be no change in velocity of B, but A will be accelerated
Show Answer
Answer:
Correct Answer: A
Solution:
[a] Initially, the momentum of packet in train A is more than in train B. When packets are changed the packet reaching train A being of lower momentum will retard the train A but packet reaching train B, being of higher momentum will accelerate B.
