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Table tennis and air resistance!

  1. Jan 26, 2009 #1
    Could anyone please explain to me how to work the following question out?

    A table-tennis ball of mass 10g is falling towards the ground with a constant speed of 8.2m/s. Calculate the magnitude and direction of the air resistance force acting on the ball.
  2. jcsd
  3. Jan 26, 2009 #2
    Shouldn't the ball be accelerating at g? But it falls at constant speed, huh?
  4. Jan 26, 2009 #3


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    What forces are acting on the ball? Since it is in uniform motion, the acceleration and total force are obvious. Should be easy to find the unknown force of air resistance!
  5. Jan 26, 2009 #4


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    If the speed is constant doesn't it mean to you that there is no net accelerating force?
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