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5) While driving a car, a 45 kg person drives in a circle with v = 9.0 m/s. The radius of the circle is 10m.

5) While driving a car, a 45 kg person drives in a circle with v = 9.0 m/s. The radius of the circle is 10m. Acceleration is 8.1 because a=v^2/r. Assuming that the person doesn't bump into anything, friction makes them go in a circle. Determine the magnitude of this force.

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