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AP® Physics C: Mechanics

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Center of Mass Velocity of Two Cars

APPHMC-3EBFPO

Two cars each with mass $M$ are heading towards each other, one with velocity $v_1 = -2 m/s$ and the other with $v_2 = 3 m/s$.

What is the speed of the center of mass of the two-car system?

A

$\frac {1} {2} m/s$

B

$ 1 m/s$

C

$\frac {3} {2} m/s$

D

$\frac {5} {2} m/s$

E

$ 5 m/s$