Block 1, of mass m, moves across a frictionless surface with speed u;. It collides elastically with block 2, of mass m2, which is at rest (v; = 0). (Figure 1)After the collision, block 1 moves with speed us, while block 2 moves with speed uf. Assume that m > m2, so that after the collision, the two objects move off in the direction of the first object before the collision. Figure Before collision U mi Image.jpg V-0 m < After collision Uf mi Vf m 1 of 1 > This collision is elastic. What quantities, if any, are conserved in this collision? View Available Hint(s) kinetic energy only momentum only kinetic energy and momentum You have already submitted this answer. Enter a new answer. No credit lost. Try again. Submit Part B Previous Answers Request Answer What is the final speed ur of block 1? Express in terms of m, m, and 4. View Available Hint(s) Submit Part C What is the final speed vf of block 2? Express vf in terms of m, m2, and u. View Available Hint(s) Uf = Submit 15. < Return to Assignment Provide Feedback wwwww ?