Two cars of equal mass travel in opposite directions at equal speeds.They collide in a perfectly inelastic collision.Just after the collision,their velocities are
A)zero.
B)equal to their original velocities.
C)equal in magnitude but opposite in direction to their original velocities.
D)less in magnitude and in the same direction as their original velocities.
E)less in magnitude and opposite in direction to their original velocities.

Question

Quizplus · Accepted Answer

In a perfectly inelastic collision, the two objects stick together and move as a single object after the collision. Since the cars have equal mass and were traveling at equal speeds in opposite directions, their momenta cancel each other out, resulting in a combined velocity of zero just after the collision.

Two Cars of Equal Mass Travel in Opposite Directions at Equal