PlanetMaster
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Since the collision is perfectly elastic, we can useView attachment 65045
so i solved this and got B as the answer but ms says the right answer is 8cm/s. Can anyone please help me with this?
\(v_{1}i+v_{1}f=v_{2}i+v_{2}f\) (You might have a different variant of this formula depending on your board)
Substituting in our values, we get
\(6+2=0+v_{2}f\)
And therefore,
\(v_{2}f=8\)
Hope this helps!