ch13-p062 - 62. (a) Circular motion requires that the force...

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Since the left-hand side of this equation is the force given as 80 N, then we can solve for the combination mv 2 by multiplying both sides by r = 2.0 × 10 7 m. Thus, mv 2 = (2.0 × 10 7 m) (80 N) = 1.6 × 10 9 J. Therefore, () 29 8 11 1.6 10 J 8.0 10 J . 22 Km v ==× = × (b) Since the gravitational force is inversely proportional to the square of the radius, then
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