A smooth sphere of mass m, moving with velocity u on a surface, collides with another smooth sphere of same size but of mass 2m. The velocity range of second sphere after collision will be
A
v>2u3
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B
v<u3
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C
v=u
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D
u3≤v≤2u3
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Solution
The correct option is Du3≤v≤2u3 Let us consider this collision to be head on.