Question

The centre of masses of two particles with masses 2 kg and 1 kg located at (1,0,1) and (2,2,0) is located at _____

(a) 4/3, 2/3, 2/3

(b) 2/3, 4/3, 2/3

(c) 2/3, 2/3, 4/3

(d) 1/3, 2/3, 2/3

The question was posed to me in homework.

I need to ask this question from System of Particles topic in chapter System of Particles and Rotational Motion of Physics – Class 11

Answer 1

The correct option is (a) 4/3, 2/3, 2/3

The explanation is: Sum of masses = 2+1 = 3

x-coordinate;

(2*1 + 1*2)/3 = 4/3

y-coordinate;

(2*0 + 1*2)/3 = 2/3

z-coordinate;

(2*1 + 1*0)/3 = 2/3.