Q. Two point objects of masses $1.5\ g$ and $2.5\ g$ respectively are at a distance of $16\ cm$ apart, the centre of gravity is at a distance $x$ from the object of mass $1.5\ g$ where $x$ is

A) $10\ cm$
B) $6\ cm$
C) $13\ cm$
D) $3\ cm$
Explanation

(a) Taking the moment of forces about centre of gravity $G$
[image:7_image132.emf]
$(1.5)gx = 2.5g(16 - x) \Rightarrow 3x = 80 - 5x$
$\Rightarrow 8x = 80 \Rightarrow x = 10cm$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.