hi, i am having difficulty solving this problem: a ballwith a mass of .75kg with

Question

hi, i am having difficulty solving this problem: a ballwith a mass of .75kg with intial velocity 4 m/s goingright collides with another ball with a mass of 015 withintial velocity of 8 m/s going left. its elastic momentumproblem. i saw the solution in the book , but it was solvedusing the quadratic equation, and i was wondering if there is anyother way to do it. the quadratic eq confused me, it states 21.6=.75(2.4-.2vf)=.15v2^2 and then from that gets21.6=.75(5.76-.96v2f=.04v2f^2......................ok where did .96come from, and please show me to do this problem in a different waywithout the quadratic hi, i am having difficulty solving this problem: a ballwith a mass of .75kg with intial velocity 4 m/s goingright collides with another ball with a mass of 015 withintial velocity of 8 m/s going left. its elastic momentumproblem. i saw the solution in the book , but it was solvedusing the quadratic equation, and i was wondering if there is anyother way to do it. the quadratic eq confused me, it states 21.6=.75(2.4-.2vf)=.15v2^2 and then from that gets21.6=.75(5.76-.96v2f=.04v2f^2......................ok where did .96come from, and please show me to do this problem in a different waywithout the quadratic

Explanation / Answer

is the second mass 015 or 0.15 or .015?

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