Two balls, having linear momenta 
and 
, undergo a collision in free space. There is no external force acting on the balls. Let 
and 
be their final momenta. Which of the following option(s) is(are) NOT ALLOWED for any non-zero value of p, a 1 , a 2 , b 1 , b 2 , c 1 and c 2
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, d) 
as there is no external force so momentum will remain conserved
Now from option
= 
= 
= 
= 
and it is given that a 1 b 1 c 1 , a 2 , b 2 , c 2 , ≠ 0
in case of A and D it is not possible to get 
= 0
Hence and
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