Determine the unknown mass (mx) that must be added at point 20 cm, to balance it horizontally, considering that there are masses hanging at points 40 cm and 80 cm, of 100g and 200 g respectively, as illustrated in the figure below. Express the result to two decimal places. DO NOT forget the units.

The axis of rotation is located at the same point of the center of gravity Xcg = 53 cm.

 

20 cm 40 cm mx 100 g 53 cm " 80 cm 200 g