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Center of Mass question

2020 · 8 Jan · Shift 2 · Q44
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Center of Mass question

2020 · 8 Jan · Shift 2 · Q44

JEE MainPhysicsCenter of MassMCQ+4 / −1
A particle of mass m is dropped from a height h above the ground. At the same time another particle of the same mass is thrown vertically upwards from the ground with a speed of 2gh\sqrt {2gh}2gh​. If they collide head-on completely inelastically, the time taken for the combined mass to reach the ground, in units of hg\sqrt {{h \over g}}gh​​ is :
  1. A
    12\sqrt {{1 \over 2}}21​​
  2. B
    12{1 \over 2}21​
  3. C
    32\sqrt {{3 \over 2}}23​​
  4. D
    34\sqrt {{3 \over 4}}43​​
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