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JAMB Physics 2002 Question 11

Question 11

Friction

Which of the following is the correct shape of the velocity-time graph of a spherical steel ball dropped into a viscous fluid in a tall cylinder?

Diagram for this question
  1. A.Graph A
  2. B.Graph B
  3. C.Graph C
  4. D.Graph D
Show the answer and explanation

Answer: D (Graph D)

Explanation

The ball speeds up quickly at first, then the viscous drag grows until it reaches a steady terminal velocity, so the curve rises and levels off (graph D).