The rotors of a 15,200-kg heavy-lift helicopter exert a downward force of 322,000 N in order to
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The rotors of a 15,200-kg heavy-lift helicopter exert a downward force of 322,000 N in order to accelerate itself and its external cargo upward at 0.50 m/s2. By itself, what upward force does the external cargo exert on the Earth?
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