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physics

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find the tension in an elevator cable which must support a 4000 N elevator with a maximum upward acceleration of 2 g's. What would be the tension if the elevator were allowed to accelerate downward at .25g's?

  • physics -

    Upwards:
    -ma = mg –T1,
    T1 = m(g+a).
    Downwards:
    ma = mg –T2,
    T2 =m(g-a).

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