Practicing Success
Practicing Success
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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 : |
13 m/s and 14 m/s 14 m/s and 15 m/s 15 m/s and 16 m/s 16 m/s and 17 m/s |
14 m/s and 15 m/s |
mg - N = \(\frac{mv^2}{r}\) For weightlessness, N = 0 mg = \(\frac{mv^2}{r}\) v = \(\sqrt{gr}\) = 14.140m/s |
