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Two identical balls each of mass 4kg are moving towards each other with speeds 2 ms–1 and 3 ms–1 respectively. They undergo head on perfectly elastic collision. Then impulse imparted by one ball on other is
Answer :
In a perfectly elastic collision
(i) Linear momentum is conserved
(ii) Kinetic energy is conserved
(iii) Total energy is conserved
In case of a perfect elastic collision of two identical masses the velocities are interchanged.
So if initial velocities of ball A and Ball B are 
and 
respectively, then the final velocities 
and 
such that
Then impulse imparted by one ball on other is
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