Three balls are moving along a straight line having the instantaneous positions shown in the figure. At that instant, find the location and velocity of the center of mass (or center of gravity) of this system. 
Definitions:
Disturbingly Graphic
Descriptive of content or imagery that is shockingly vivid and explicit, often causing distress or discomfort to the viewer or reader.
Self-Serving Attribution
The tendency to attribute positive outcomes to oneself and negative outcomes to external factors.
Social Psychology
The scientific study of the causes and consequences of people’s thoughts, feelings, and actions regarding themselves and other people.
Demanding
Requiring or claiming more time, attention, effort, or resources than is considered usual or reasonable.
Q13: A system consisting of blocks, a light
Q16: Enzo throws a rock horizontally with a
Q21: You throw a rock horizontally off a
Q27: A push of magnitude P acts on
Q49: The x and y components of a
Q58: A uniform ball is released from rest
Q91: Consider a uniform hoop of radius R
Q110: The figure shows four vectors,
Q131: Suppose a solid uniform sphere of mass
Q168: A 30-N stone is dropped from a