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  • A lift is moving up with an acceleration of 3.675   The weight of man ? <div class='

A lift is moving up with an acceleration of 3.675 m /s^2 

The weight of man ? 

Option: 1

increases by 37.5 % 


Option: 2

decreases by 37.5 % 


Option: 3

increases by 137.5 % 


Option: 4

remains the same 


Answers (1)

best_answer

Solution :
\\ \text{When lift is moving up,net force is in upward direction} \\ f=R-mg \\R=ma+mg \ \ \ \ \ \therefore f=ma \\R=m(a+g) \\ \therefore \text{Increase in weight }=\frac{\text{Apparent weight -Actual weight }}{\text{Actual weight}}\times 100 \\ \\ =\frac{ma+mg-mg}{mg}\times 100 \\ \\ = \frac{ma}{mg}\times 100 \\ \\ =\frac{a}{g}\times 100 \\ \\ = \frac{3.675}{10}=36.75 %

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