Question #d4f09

1 Answer
Apr 5, 2016

Answer:

When the elevator is rising with an acceleration #a=g#, acceleration due to gravity.

Explanation:

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  1. Elevator is at rest: the scale will read normal weight of the object, #W = mg#, where #m# is mass and #g# is acceleration due to gravity.

  2. When the elevator is rising with an acceleration #a=g#:
    Scale will show that weight #W=m(g + g) = 2mg#.

  3. When the elevator is moving down with an acceleration #a=-g#:
    Scale will show that weight #W=m(g - g) = 0#.