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A 1 g raindrop falls 1 km, landing at 50 m/s (g = 10). Work by air resistance?
A-1.25 J
B-8.75 J
C+8.75 J
D-10 J
Answer & Solution
Correct answer: B. -8.75 J
Resistive work equals the 1.25 J kinetic gain minus the 10 J gravity work, which is -8.75 J.
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