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Frictional Force

  1. Oct 24, 2005 #1
    A skydiver jumps from an airplane and descends at a constant velocity of 2m/s. The mass of the skydiver and his equipment is 70kg. Calculate the magnitude of the air's frictional force acting on the skydiver and his equipment.

    F = 70kg x 9,8N/kg = 686N

    I'm lost :yuck:
     
  2. jcsd
  3. Oct 24, 2005 #2
    Can anyone please help me with this one real quick.

    I know that Fnet is Fa - Ff = MA
    His mass is 70kg and velocity 2m/s. But since i don't have the distance of his fall or the time i can't calculate the acceleration. So how do I figure out the magnitude of the air's frictional force which would be Ff???

    :cry: :cry: :cry: :cry: :cry:
     
  4. Oct 25, 2005 #3

    Doc Al

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    Staff: Mentor

    Reread the problem statement carefully: the acceleration is given.
     
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