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Three masses are placed on the x-axis : ...

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

A

40cm

B

45cm

C

50cm

D

30cm

Text Solution

Verified by Experts

The correct Answer is:
A
`X_(CM)= (m_(1)x_(1) + m_(2) x_(2) +m_(3) x_(3))/(m_(1) + m_(2) + m_(3))= (300 + 0 + 500 xx 40 + 400 xx 70)/(300+ 500+ 400)`
`=(48000)/(1200)= 40cm`
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