A Mobile Is Constructed from a Metal Bar and Two

Multiple Choice

A mobile is constructed from a metal bar and two wooden blocks as shown in the figure.The metal bar has a mass of 2.0 kg and is 12 cm long.There is a 3.0-kg wooden block hanging from the left end of the metal bar and a string to support the mobile is tied to the metal bar at a distance of 3 cm from the left end.How large of a wooden block should be hung from the right end of the bar to keep the bar level?

A) 0.33 kg
B) 0.50 kg
C) 1.0 kg
D) 2.0 kg
E) 3.0 kg