- #1
yvonne1313
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Homework Statement
A frictionless rollercoaster does a vertical loop with a radius of 6.0m.
a) what is the minimum speed that the roller coaster must have at the top of the loop so that it stays in touch with the rail?
Homework Equations
2∏r should be used for the circumference but i don't know which equation of motion to use, v=u+gt/ v=u+at
The Attempt at a Solution
i worked out the circumference to be 37,70m but I am stuck with that and don't know what to do next