The earth exerts a gravitational force of F(r) = (2.99 10 16 )/r 2 newtons on
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The earth exerts a gravitational force of F(r) = (2.99 × 1016)/r2 newtons on an object with a mass of 75 kg located r meters from the center of the earth. Find the rate of change of force with respect to distance r at the surface of the earth.
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