# Solving Momentum Problems

“It is not too difficult to become a good problem solver, but a Ph. engineer will not know the difficulties of being an infantryman,” he explained further.

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This means that you end up with a change in momentum of 2*m*v because the velocity completely changes direction.

Case B is a little bit more complicated because it’s not only in the horizontal direction, it also has velocity in the vertical direction.

In A, it bounces right back to retrace its path; in B, it bounces diagonally (path shown in dotted line).

The initial speed of the ball is the same in both cases and no energy is lost in either collision. (A) There is not enough information to determine which case has a greater change in momentum (B) The change in the ball’s momentum is zero for both cases (C) The change in the ball’s momentum is greater for case A than for B (D) The change in the ball’s momentum is the same in both cases (but not zero) (E) The change in the ball’s momentum is greater for case B than for A – Breaking down the problem statement and final answer: It says the correct answer is C, the change in the ball’s momentum is greater for case A than for case B.

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