Work Energy And Power Question 125
Question: Four smooth steel balls of equal mass at rest are free to move along a straight line without friction. The first ball is given a velocity of 0.4 m/s. It collides head on with the second elastically, the second one similarly with the third and so on. The velocity of the last ball is [UPSEAT 2004]
Options:
A) $ 0.4m/s $
B) $ 0.2m/s $
C) $ 0.1m/s $
D) $ 0.05m/s $
Show Answer
Answer:
Correct Answer: A
Solution:
In head on elastic collision velocity get interchanged (if masses of particle are equal). i.e. the last ball will move with the velocity of first ball i.e 0.4 m/s
