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A paratrooper of mass 75 kg falls with a...

A paratrooper of mass 75 kg falls with a constant velocity. Find the air resistance acting on him.

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As the acceleration is zero, there is no resultant force acting on the paratrooper. The weight acting downwards = 75`xx` 9.8 = 735 N.
Therefore, the air resistance, acting upwards, is R = 735 N.
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