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NEET 2020 (Phase 1) · Centre of Mass of Discrete Particles

Centre of Mass of Discrete Particles question from NEET 2020 (Phase 1)

Q14NEET 2020 · PHASE 1Easy

Centre of Mass of Discrete Particles

Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass.

The centre of mass of the system from the 5 kg particle is nearly at a distance of:

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Answer: (b)

Take the 5 kg particle as origin: $x_{cm} = \frac{10 \times 1}{5 + 10}$ m
$x_{cm} = \frac{2}{3}$ m $\approx 0.67$ m $= 67$ cm
So the answer is (b) 67 cm.

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