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Q.

A solid sphere is moving and it makes an elastic collision with another stationary sphere of half of its own radius. After collision it comes to rest. The ratio of the densities of the materials of second sphere and first sphere is

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An Intiative by Sri Chaitanya

a

2

b

8

c

16

d

4

answer is C.

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Detailed Solution

v1=0   m1-m2m1+m2u1=0
m1−m2=0⇒m1=m2
43πr3ρ1=43πr38ρ2 ⇒ρ2ρ1=8 : 1

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