Physics

Problem

Four point masses lie along a straight track:

1\,\text{kg}

x=-0.40\,\text{m}

2\,\text{kg}

x=0

3\,\text{kg}

x=+0.60\,\text{m}

, and

4\,\text{kg}

x=+1.0\,\text{m}

. The

4\,\text{kg}

mass is instantaneously removed from the system. What is the new x-coordinate of the center of mass of the remaining masses? a)

+0.38\,\text{m}

+0.54\,\text{m}

+0.23\,\text{m}

+0.14\,\text{m}