1guys pls help
a ball of mass m1 experiences a perfectly elastic collision with a stationary ball of mass m2 what fraction of KE does the striking ball lose,if
a)it recoils at right angle to the original direction of motion,and
b)the collision is head on one
guys tell me if i am wrong 'in an elastic collision KE is conserved '
how can a part of KE be lost.is the problem wrong if not how to solve it
pls help
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6 Answers
1just take out the velocity after collision of the second ball(m2)
and then apply conservation of momentum principle to find the velocity of m1
and then loss in KE=1/2m1(v1^2-v2^2)
1During collison, as large impulsive force acts,so,kinetic energy changes and hence its not proper to say
dat " KE is conserved in elastic collison but it'll be more appropriate to say dat in elastic collison ,KE after
collison remains same as it ws before.
now,coming to d question,for d first one, perhaps its zero and second one,what arshad hs typed.
1aieee , don't u think both the things that u said about elastic collision and KE are same????
1hey energy remains conserved in head on collision. or any type of elastic collision K.E. AND momentum are conserved