A $3.50 \mathrm{~kg}$ mass is on an incline with initial height $h=6.50 \mathrm{~m}$ and initial speed $v_{0}=9.50 \mathrm{~m} / \mathrm{s}$. It slides down the incline. It then slides horizontally and comes to a stop after compressing a spring by a distance $x_{f}$, as shown below. If the spring constant is $k=220 \mathrm{~N} / \mathrm{m}$, what is the distance $x_{f}$, in $\mathrm{m}$ ? Assume there is no friction. 1.86 1.20 1.42 0.156 This can't be answered unless you know the angle of the incline.

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