Posted by **Tom** on Saturday, December 7, 2013 at 10:53pm.

A ferris wheel has diameter of 24 m and is 4 m above ground level at its lowest point. Assume that a rider enters a car from a platform that is 30^0 around the rim before the car reaches its lowest point. Model the rider's height above the ground versus angle using a transformed sine function

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**Steve**, Sunday, December 8, 2013 at 7:33am
If we consider x the angle traveled since getting on the wheel,

h = 16+12sin(x-120)

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**Tom**, Sunday, December 8, 2013 at 11:25am
Thanks Steve, but what is the reason for minus 120 and not plus 120?

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**Steve**, Sunday, December 8, 2013 at 11:38am
I drew the diagram with the person boarding at -120°. As the wheel turns counter-clockwise, x starts increasing from 0°. Depending on how you set up your diagram, maybe +120° is appropriate.

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