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NEET 2012
Exam
NEET
Year
2012
Subject
Physics
Chapter
Center of Mass, Momentum and Collision

NEET 2012 · Physics · Center of Mass, Momentum and Collision

Two persons of masses 55 ~kg and 65 ~kg respectively, are at the...

Two persons of masses 55 kg55 \mathrm{~kg} and 65 kg65 \mathrm{~kg} respectively, are at the opposite ends of a boat. The length of the boat is 3.0 m3.0 \mathrm{~m} and weighs 100 kg100 \mathrm{~kg}. The 55 kg55 \mathrm{~kg} man walks up to the 65 kg65 \mathrm{~kg} man and sits with him. If the boat is in still water the centre of mass of the system shifts by

Options

  1. A3.0 m3.0 \mathrm{~m}
  2. B2.3 m2.3 \mathrm{~m}
  3. Czero
  4. D0.75 m0.75 \mathrm{~m}

Correct answer

C. zero

Step-by-step solution

Here on the entire system net external force on the system is zero hence centre of mass remains unchanged.
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