A-LevelPhysicsDynamics9702/12 · May/June 2013 · Q101 Mark
Two bodies travelling in a straight line collide in a perfectly elastic collision. Which of the following statements must be correct?
AThe initial speed of one body will be the same as the final speed of the other body.
BThe relative speed of approach between the two bodies equals their relative speed of
separation.
CThe total momentum is conserved but the total kinetic energy will be reduced.
DOne of the bodies will be stationary at one instant.
✓ Correct answer
B: The relative speed of approach between the two bodies equals their relative speed of separation.
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