AP Physics 1 Question 340: Answer and Explanation
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8. If a roller coaster cart of mass m was not attached to the track, it would still remain in contact with a track throughout a loop of radius r as long as
- A. v≤
- B. v≥
- C. v≤
- D. v≥
Correct Answer: B
At the top of the loop, the cart will remain in contact as long as the centripetal force is at least as much as the force of gravity on the cart.