A Barbell Is 1

Multiple Choice

A barbell is 1.5 m long.Three weights,each of mass 20 kg,are hung on the left and two weights of the same mass,on the right.The width of each weight is 4 cm and each group of weights is placed 4 cm from the ends.Where is the center of mass of the barbell as measured from the mid-point,M,of the bar? The bar is of uniform mass and has mass 5 kg,and the retaining collars are of negligible mass.Take to the right as positive.

A) -5.90 cm
B) -5.62 cm
C) +5.62 cm
D) +5.90 cm
E) None of the above