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What is the centripetal force that would be required to keep a 4.0 kg mass moving in a horizontal circle with a radius of 0.80 meters at a speed of 6.0 meters/second? A. 3.9 × 10^1 newtons tangent to the circle B. -3.0 × 10^1 newtons tangent to the circle C. 1.4 × 10^2 newtons radially outward D. 1.8 × 10^2 newtons radially inward E. 1.8 × 10^2 newtons radially outward.

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