AP Physics 1· difficulty 2/5
In a 1-D elastic collision between two equal masses, one moving at and the other at rest, what are the velocities after the collision?
The first stops; the second moves at
Both move at in the original direction
The first moves at ; the second at
Both stop
Explanation
A classic result: for equal masses in a 1-D elastic collision, the projectile stops and the target takes on the projectile's velocity.
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