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

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:
  1. 50 cm
  2. 67 cm
  3. 80 cm
  4. 33 cm

Solution

mr=constantr1m

r1r2=m2m1=105=21

r1=23r=23×100m=67cm

Asked in: NEET 2020 (Phase 1)

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