A roller coaster is designed such that riders experience "weightlessness" as they go round the top o

Question

A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is 40 m . The speed of the car at the top of the hill is

Professor PC Thomas Classes · Answer

$m g=\frac{m v^{2}}{R} \Rightarrow v=\sqrt{R g}$\ $v=\sqrt{40 	imes 10}=\sqrt{400}=20 \mathrm{~m} / \mathrm{s}$\