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Questions  

A particle of mass 0.1 kg moving with an initial speed v collides with another particle of same mass kept  at rest. If after collision total energy becomes 0.2 J. Then

a
maximum value of   is 4 m/s
b
minimum value of  is 2 m/s
c
minimum value of  is   3 m/s
d
maximum value of is 6 m/s

detailed solution

Correct option is B

maximum kinetic energy if the collision is perfectly elastic 12mv2=0.2 so minimum value of v =2m/s

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