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Output rating of the pump motor in watts

  1. Dec 4, 2005 #1

    A pump is to lift 29.0 kg of water per minute through a height of 3.70 m. What output rating (watts) should the pump motor have?

    An airplane pilot fell 380 m after jumping without his parachute opening. He landed in a snowbank, creating a crater 1.2 m deep, but survived with only minor injuries. Assume that the pilot's mass was 75 kg and his terminal velocity was 50 m/s.
    (a) Estimate the work done by the snow in bringing him to rest.
    (b) Estimate the average force exerted on him by the snow to stop him.
    (c) Estimate the work done on him by air resistance as he fell.
  2. jcsd
  3. Dec 4, 2005 #2

    Math Is Hard

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    Staff Emeritus
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    Gold Member

    ok, I give up. What's the answer?
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