Question: You point a tennis-ball serving machine straight up and put a piece of plastic wrap across the top of the barrel, placing a (10 mathrm{~g})

You point a tennis-ball serving machine straight up and put a piece of plastic wrap across the top of the barrel, placing a $10 \mathrm{~g}$ marble on top of the barrel. When a $58 \mathrm{~g}$ tennis ball in the machine is fired, it sends the marble into the air. The marble rises $200 \mathrm{~m}$ above the barrel mouth, and the tennis ball rises $54 \mathrm{~m}$. Neglecting the plastic wrap, what is the ball's launch speed?

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