Physics

A box is suspended by a string from the ceiling of an elevator. The string supports the box with a force of
17.0 N when the elevator is accelerating downwards at 1.70 m/s2. What force would the string exert if the elevator was moving upwards at a constant velocity

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  1. tension=mass(g-a) going down
    17=mass(9.8-1.70)
    mass=17/(8.1)

    going up
    tension=mass(g+a) but a =0
    tension=17/(8.1)*(9.8)

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