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Homework Help: Window Washer Problem (Forces)

  1. Oct 27, 2003 #1
    A window washer pulls herself upward using a bucket-pulley apparatus. How hard must she pull downward to raise herself slowly at constant speed? If she increases this force by 10% what will her acceleration be? The mass of the person and bucket is 65 kg.

    Need some help, gracias.
     
  2. jcsd
  3. Oct 27, 2003 #2

    HallsofIvy

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    Science Advisor

    Force= mass * accleration.

    If the person is moving at constant speed (no acceleration) that means there is no net force- she is pulling just enough to equal her weight. You are given that her mass is 65 kg. What is her weight?

    Now, increase that pull by 10%. Subtract off her weight again to get net force and use "force equals mass times acceleration".
     
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