Question
Three identical spheres of mass 
each are placed at the corners of an equilateral triangle of side 2
. Taking one of the corner as the origin, the position vector of the centre of mass is
(
-
)
+
(-)
+
The correct answer is: +
The 
coordinate of centre of mass is
Position vector of centre of mass is 
.
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shaped object with dimension shown in the figure, is lying on a smooth floor. A force 
is applied at the point 
parallel to 
, such that the object has only the translational motion without rotation. Find the location of 
.
