Chapter 6, Problem 80E

(a)

To determine

The center of the mass of the system when all of the masses are equal.

(b)

To determine

The center of the mass of the system when $m_2=m_4=2m_1=2m_3$.

(c)

To determine

The center of the mass of the system when $m_1=1.0\text{kg, }{m}_2=2.0\text{kg, }{m}_3=3.0\text{kg, }{m}_4=4.0\text{kg}$.