Question

- 5. Two particles of mass 1 kg and 2 kg are located at x = 0 and x = 3 m. Find the position of their centre of mass a) 2 m b) 3 m c) 4 m d) 1 m​

Answer 1

Answer:

Correct option is B)

Since, both the particles lies on x - axis, the COM will also lie on x - axis. Let the COM islocated at x= x, then

r1= distance of COM from the particle of mass 1 kg= x

and r2= distance of COM from the particle of mass 2 Kg = (3 - x)

Using r2/r 1 = m 1/m 2

​or x/3-x= 12

​or x=2m

Thus, the COM of the two particles is located at x = 2 m.