CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
A roller coaster is designed such that riders experienceÂ " weightlessness" as they go round the top of a hill whose radius of curvature is 20 m. Â The speed of the car at the top of the hill is between
14 m/s and 15 m/s
15m/s and 16 m/s
16 m/s and 17 m/s
13m/s and 17 m/s
A.
14 m/s and 15 m/s