Two cars (A and B) of mass 1.5 kg collide. Car A is initially moving at 12 m/s, and car B is initially moving in the same direction with a speed of 6 m/s. The two cars are moving along a straight line before and after the collision. What will be the change in momentum of this system after the collision?  a. −27 kg • m/s b. zero c. +27 kg • m/s d. It depends on whether the collision is elastic or inelastic.

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