Chapter 3.4, Problem 2dT

Imagine a single object whose mass is equal to the mass of system C and whose momentum is equal at all times to ${\stackrel{\to }{p}}_c$ . Draw an arrow that represents the direction of the velocity of that object. If the velocity is zero, state that explicitly.

The velocity that you have found is called the velocity of the center of mass, ${\stackrel{\to }{\upsilon }}_{cm}$ , of system C.