# Collisions and Isolated Systems Graphs#

The figure below shows the velocity versus time graphs of two different collisions. The graph on the left shows a collision between cart A and cart S. The graph of the right shows a collision between cart B and cart S.

## Part 1#

If $$\frac{m_A}{m_S}$$ = 1/2 and $$\frac{m_B}{m_S}$$ = 3, for which of the collisions is the system of carts an isolated system?