1.

Riders on a Ferris wheel travel in a circle in a vertical plane. A particular wheel has radius 20 feets and revolves at the constant rate of one revolution per minute. How many seconds does it take a rider to travel from the bottom of the wheel to a point 10 vertical feet above the bottom?

Answer» `R=2pi(ratios)/(min)`
`Costheta=(R/2)/(R)`
`Costheta=1/2`
`theta=pi/3 radian`
`T=theta/(2theta)=(pi/3)/(2pi)`
`T=1/6` minutes
`T=1/6*60=10 seconds`.


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