Question
Asked Jan 26, 2019
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Given: You walk into an elevator, step onto a scale, and push the "up" button. You recall that your normal weight is 621 N .

Asked: When the elevator has an upward acceleration of magnitude 2.20 m/s2 , what does the scale read?

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Expert Answer

Step 1

Normal force N on the person of mass m is upwards. Weight of the person W  is acting downwards. The acceleration a of the elevator is upwards. The free body diagram is given below.

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Step 2

The scale will read the magnitude of normal force. From the free body diagram, the equation of motion is,

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Step 3

Substituting the...

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