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Physics 8 Online
OpenStudy (anonymous):

A car is going from left to right over the top of a circle shaped hill of radius 50m. When the car is at point a it is going 10 m/s and is speeding up. At point b the car is going 15 m/s. In going from point a to point b the car moves through an arc of 20 degrees. Find the direction and magnitude of the average acceleration of the car as it moves from point a to point b.

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