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Standard XII
Physics
Question

Mandy stands on a weighing scale inside a lift (elevator) that accelerates vertically upwards as shown in the diagram below. The forces on Mandy are her weight W and the reaction force from the scale R. The reading of scale is:
132876_0775d632120544c4846458573a3a662d.png
  1. W
  2. R+W
  3. R
  4. R−W

A
R−W
B
R+W
C
W
D
R
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Solution
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The reading of the scale will show reaction force R. But the normal force will be more than the weight of the body as it is accelerating upward.

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132876_0775d632120544c4846458573a3a662d.png
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