question_answer

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

Correct Answer: A

Solution :

                  Taking the moment of forces about centre of gravity G is \[(1.5)gx=2.5g(16-x)\]\[\Rightarrow \]\[3x=80-5x\]or \[8x=80\]or\[x=10\,cm\]