11:10 pts possible Two balls have masses m and m2. Ball m has an initial velocity v1 > 0 (to the right) along a line joining the two balls and ball m2 is at rest. They make a head-on elastic collision with each other.
1. +v1 < v < +2v1
2. v = 0
3. -v < -v1
4. +2v1 < v +
5. v = +2v1
6. 0 < < +v1
7. = +v1
8. u = -v1
0 < a < 1