A 200-M Rod of Negligible Mass Connects Two Small Objects

Multiple Choice

A 2.00-m rod of negligible mass connects two small objects. The mass of one object is 1.00 kg and the mass of the other is unknown. The center of mass of this system is on the rod a distance 1.80 m from the 1.00-kg mass object. What is the mass of the other object?

A) 4.11 kg
B) 3.22 kg
C) 9.00 kg
D) 0.111 kg
E) 0.900 kg