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Homework Help: Please help me .

  1. Oct 13, 2005 #1
    please help me.....

    (a) An elevator of mass m moving upward has two forces
    acting on it: the upward force of tension in the cable and
    the downward force due to gravity. When the elevator is
    accelerating upward, which is greater, T or w? (b) When
    the elevator is moving at a constant velocity upward,
    which is greater, T or w? (c) When the elevator is moving
    upward, but the acceleration is downward, which
    is greater, T or w? (d) Let the elevator have a mass of
    1 500 kg and an upward acceleration of 2.5 m/s2. Find T.
    Is your answer consistent with the answer to part (a)? (e)
    The elevator of part (d) now moves with a constant up-
    ward velocity of 10 m/s. Find T. Is your answer consistent
    with your answer to part (b)? (f) Having initially moved
    upward with a constant velocity, the elevator begins to ac-
    celerate downward at 1.50 m/s2. Find T. Is your answer
    consistent with your answer to part (c)?
     
  2. jcsd
  3. Oct 13, 2005 #2
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