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

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
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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