A metal ball of weight W falls through a column of glycerine of viscosity V....
PHYSICS
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
Correct Answer: B. W = U + V
Explanation
When terminal velocity is attained, The equation of motion becomes
mg - V - U = 0
? mg = W = U + V
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