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A bullet weighing 0.1 lb is fired vertically downward from a stationary helicopter with a muzzle...

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Physics

A bullet weighing 0.1 lb is fired vertically downward from astationary helicopter with a muzzle velocity of 1200 ft/sec. Theair resistance (in lbs) is numerically equal to16-5v2, where v is the velocity of the bulletin ft/sec.

a)If the helicopter is 3,000 ft high, how long does it take forthe bullet to hit the ground?

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