📅 NSB 2015🎓 HS🔄 Round 12#️⃣ Q19🌟 BONUS✍️ Short Answer
A rollercoaster cart slides down a frictionless track and then goes around the inside of a loop-the-loop with radius R. In terms of R, what is the minimum height the rollercoaster cart must start at in order to just make it around the loop?
✔️Answer:2.5R
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