Posted by GRISSELL on Sunday, February 5, 2012 at 6:46pm.
Newton's first law says:
"The velocity of a body remains constant unless the body is acted upon by an external force"
If the skydiver falls at a constant speed (not accelerating), this means that his weight due to gravity is off-set (balanced) by some external force, of which the only one is air-resistance.
Therefore there is enough information to tell which of the three given answer is correct, remembering that any unbalanced force will cause acceleration or deceleration.
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