A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is $20 m$ . The speed of the car at the top of the hill is between

14 m / s

and

15 m / s

15 m / s

and

16 m / s

16 m / s

and

17 m / s

13 m / s

and

14 m / s

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A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is

20 m

. The speed of the car at the top of the hill is between

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A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is

20 m

. The speed of the car at the top of the hill is between

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