Question

Hello, I do not understand what this question is asking.

Answer 1

`KE=m\cdot(v^2)/(2)`
`\begin{gathered} KE1\cdot3=KE2 \\ 3\cdot m\cdot(v_1^2)/(2)=m\cdot(v_2^2)/(2) \\ 3v_1^2=v_2^2=(v_1+2)^2 \\ 3v_1^2=v_1^2+4v_1+4 \\ 2v_1^2-4v_1-4=0 \\ (4\pm√(16-4\cdot2\cdot-4))/(4)=1\pm(√(16+32))/(4)=1\pm√(3) \end{gathered}`
`v_1=√(3)+1`