Strange Energy/Reaction Question, Scumbag HRK

[conquerer7]

Homework Statement

Consider the reaction A + B -> C + D. Show that this can be an elastic collision if there is no change in the colliding bodies.

Homework Equations

Law of Conservation of Energy.

The Attempt at a Solution

No clue how to approach it, or what exactly they're asking. The solutions manual, which has a fully worked out solution for every other question in the textbook, has this as the solution:

"#8. Hmm."

 

[PeterO]

Homework Statement

Consider the reaction A + B -> C + D. Show that this can be an elastic collision if there is no change in the colliding bodies.

Homework Equations

Law of Conservation of Energy.

The Attempt at a Solution

No clue how to approach it, or what exactly they're asking. The solutions manual, which has a fully worked out solution for every other question in the textbook, has this as the solution:

"#8. Hmm."

I concur - "Hmm" is the best I can do too!