A System Is Made of Four Objects

Multiple Choice

A system is made of four objects. The masses and the positions of their centers of mass in a rectangular frame are as follows: Particle 1 of mass 2.0 kg is placed at r₁ = 3.0i - 2.0j m; particle 2 of mass 3.0 kg is placed at r₂ = -1.0i + 1.0j m; particle 3 of mass 2.0 kg is placed at r₃ = 3.0j m; and particle 4 of mass 4.0 kg is placed at r₄ = -1.0i m. The y component of the center of mass of the system is

A) -2.0 m.
B) -0.45 m.
C) 0.0 m.
D) 0.45 m.
E) 2.0 m.