A 84 kg student is entering an elevator on the 2nd floor of the library and step

Question

A 84 kg student is entering an elevator on the 2nd floor of the library and steps on a bathroom scale that happens to be there. The student pushes the button to 5th floor, the doors close and the elevator begins to speed up at a constant rate of 0.54 m/s^2. While the elevator speeds up, what is the reading on the scale? Convert your answer to pounds and use lbs as units. A 84 kg student is entering an elevator on the 2nd floor of the library and steps on a bathroom scale that happens to be there. The student pushes the button to 5th floor, the doors close and the elevator begins to speed up at a constant rate of 0.54 m/s^2. While the elevator speeds up, what is the reading on the scale? Convert your answer to pounds and use lbs as units.

Explanation / Answer

Here ,

mass of student , m = 84 Kg

when the elevator is going up , a = 0.54 m/s^2

weight on scale = m *(g + a )

weight on scale = 84 *(9.8 + 0.54)

weight on scale = 868.56

mass on scale = 868.56/9.8

mass on scale = 88.6 Kg

the reading on the scale is 88.6 Kg

mass on scale = 88.6 * 2.204

mass on scale = 195.33 lbs

the mass on scale is 195.33 lbs

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