A metal ball of weight W falls through a column of glycerine of viscosity V....

WAEC 2012

A metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained, then

A. W > U + V
B. W = U + V
C. W = U - V
D. W < U + V

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Correct Answer: Option B

Explanation

When terminal velocity is attained, The equation of motion becomes

mg - V - U = 0

\(\therefore\) mg = W = U + V

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A metal ball of weight W falls through a column of glycerine of viscosity V....

Correct Answer: Option B

Explanation

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