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Homework Help: Force of water on falling bag

  1. Dec 16, 2009 #1
    At an altitude of 315 m above a lake, a hot-air balloon pilot drops a 2.50 kg sandbag. If the bag comes to a stop 4.50 m below the surface of the lake, what force was applied by the water on it?

    I was thinking v= 2.50kg x 9.81km/h= 24.525m/s
    i cant remember how to get the force
  2. jcsd
  3. Dec 16, 2009 #2


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    Homework Helper

    Re: force

    Like I replied in your other thread with the same problem, use the law of conservation of energy.

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