Rotational Motion Question 77

Question: Three masses are placed on the x-axis: 300 g at origin, 500 g at x=40cm and 400g at x=70cm . The distance of the centre of mass from the origin is

[AIPMT (M) 2012]

Options:

A) 40 cm

B) 45 cm

C) 50 cm

D) 30 cm

Show Answer

Answer:

Correct Answer: A

Solution:

  • xCM=m1x1+m2x2=m3x3m1+m2+m3 =300(0)+500(40)+400(70)300+500+400 =20000+280001200 =480001200 =40cm


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