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An awkward shaped ball with mass of m = 0.125 kg is freely falling vertically from...

An awkward shaped ball with mass of m = 0.125 kg is freely falling vertically from the   top of a tower. The drag force on the ball is given by the relationship FD= bv2 + cv + d where b = 7 kg/m, c = 25 kg/s, d = 0.5 kgm/s2, and v is the velocity of the ball. Using     this information determine the terminal velocity of the ball.

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Answer #1

At terminal velocity

FD = Fg

bv2 + cv + d = mg

7v2 + 25v + 0.5 = 0.125 x 9.8

v = 0.0288 m/s

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