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

Question

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

Quizplus · Accepted Answer

The Answer of 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

A Barbell Is 1