McKenzie S. answered • 10/04/17

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Centripetal acceleration:

**a**, where_{c}= v^{2}/ra

_{c}= g = 9.8 m/s^{2};v = speed = ?;

r = 30 km = 3×10

^{4}mv = sqrt(a

_{c}r) = sqrt[(9.8 m/s^{2})(3×10^{4}m)] = 542.2 m/s