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Homework Help: Weight/Newtons/unknown method

  1. Sep 21, 2005 #1
    Here is the question

    To lift a patient, four nurses grip the sheet on which the patient is lying and lift upward. If each nurse exerts an upward force of 240n, and the patient has an upward acceleration of .504 m/s^2, what is the patients weight.

    answer: 913 N

  2. jcsd
  3. Sep 21, 2005 #2
    weird, I keep getting 638N

    Are you sure this answer you provided is correct?
  4. Sep 21, 2005 #3
    I get 913 N as the weight as well.

    960 N=W+m*.540 m/s^2
    960 N= m(g+.54)
    m=93.08 kg
    W=mg=913 N
  5. Sep 27, 2005 #4
    riru, just in case u missed that,
    960n force up
    .504 m/s^2 acceleration

    960n=?kg*(.504+9.8)---->to accelerate upwards, the force is the upward velocity, plus gravity, since that is being overcome.

    thus, you have 93.2kg patient (mass)
    so 93.2kg*9.8m/s^2=913n
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