Question Detail
Question
For a one-dimensional elastic collision, a simpler equation can be used in place of the kinetic energy conservation equation. This simpler equation relates the relative velocities before and after the collision as:
Correct Answer
Option B is the correct answer.
Detailed Explanation
For an elastic collision, deriving from the conservation equations yields the relation v1i + v1f = v2f + v2i. This is often rearranged to v1i - v2i = -(v1f - v2f).
Hint
This equation states that the relative speed of approach equals the relative speed of separation.