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Homework Help: String Tension?

  1. Jun 13, 2014 #1
    A 17.0 kg monkey hangs from a cord suspended from the ceiling of an elevator.The cord can withstand a tension of 220 N and breaks as the elevator accelerates.

    (A) What was the elevator’s maximum acceleration before the cord breaks?

    (B) What is the tension in the string if the elevator accelerates with the same magnitude but opposite direction?


    I got (A) as 3.14, I just don't know how to approach (B).

    Thanks in advance!
  2. jcsd
  3. Jun 13, 2014 #2


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    What direction is the opposite direction?

    What net force on the monkey would be required to have that acceleration?

    What forces are acting on the monkey?
  4. Jun 13, 2014 #3
    Remember that acceleration has units. 3.14 elephants per coulomb would have the same numerical value, but not the same meaning.

    Besides that, the questions posted by Nathanael should point you in the right direction.
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