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Is the answer right

  1. Nov 21, 2008 #1
    The tension on a string from which a 4.0 kg object is suspended in an elevator is equal to 44.0 Newton.

    What is the acceleration of the elevator?

    Is this answer rigth

    44 N - (4.0 kg X 9.8) = a (4.5 + 4) I think the 4.5 is mass of elevator and 4 the mass of the object which is suspended.

    Acceleration = 0.57 m/s^2
     
  2. jcsd
  3. Nov 22, 2008 #2

    Hootenanny

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    You're almost there. Why do you need to include the mass of the elevator and where do you pull that value of 4.5kg from?
     
  4. Nov 22, 2008 #3
    I think this is ok now isn't it?

    F=4.8N
    F=ma
    4.8kg*m/s^2=4kg*a
    a=1.2m/s^2 [u
     
  5. Nov 22, 2008 #4

    Hootenanny

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    Looks good to me :approve:
     
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