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Bob is riding in a roller coaster, and is at the top of a vertical loop (shown below). The radius of the loop is 18 meters. If his apparent weight is just 28% of his actual weight, what is the speed of the roller coaster? Show all your steps.

Bob is riding in a roller coaster and is at the top of a vertical loop shown below The radius of the loop is 18 meters If his apparent weight is just 28 of his class=

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storageformedicine
At the top, N + mg = ma
0.28mg + mg = ma
0.28g + g = V^2/r
V = ( 1.28 x 9.8 x 18 )^1/2 = 15m/s

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