- #1
TomK
- 69
- 14
- Homework Statement
- ENGAA 2018 (Section 2, Question 4)
- Relevant Equations
- Conservation of momentum
I don't understand the reasoning of this question's answer. The answer is velocity = 0 (option A).
A while ago, I was told that, since the magnets were held at-rest (before being let go), they must have no velocity after the collision. What about the velocity which they had just before the collision? It is stated that the larger magnet has velocity v.
If you try to use conservation of momentum, you end-up with too-many unknown variables, meaning you must make an assumption about conservation of energy to get an answer.