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Q.

A smooth sphere of mass M moving with velocity u directly collides elastically with another sphere of mass m at rest. After collision their final velocities are V and v respectively. The value of v is

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a

2uMm

b

2umM

c

2u1+mM

d

2u1+Mm

answer is C.

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Detailed Solution

v2=m2−m1m1+m2 u2+2m1u1m1+m2=2MuM+m=2u1+mM
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