DECATUR — The gravity on Mars is about a third of Earth’s, so if you were to hit a ball on Mars, it would go about three times as far.
Matthew Long, 12, and T.J. Olivign, 13, figured that out during the Thinkwell makers’ camp at Richland Community College this week.
“It’s just an equation,” T.J. said. “We looked up the formula and I did all the math, and we wrote everything down and made it so we can plug in angle, force, and gravity that will work on any planet.”

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