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AP® Physics 1 & 2

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The Velocity of the Center of Mass

APPH12-JKS8W6

Two gliders, (X and Y), collided on a horizontal, frictionless air-track. Due to the velcro strips attached to each glider, they stuck together after the collision. The mass of glider X was 0.15 kg and its velocity before the collision was 0.27 m/s to the right (the positive direction). The mass of glider Y was 0.25 kg and its velocity before the collision was 0.19 m/s to the left.

What was the velocity of the center of mass of the two glider system before the collision?

A

-0.018 m/s

B

0.050 m/s

C

0.080 m/s

D

0.22 m/s