Answer:
Upward force on the boy will be 1024 N
Explanation:
We have given mass of the boy m = 80 kg
Acceleration due to gravity [tex]g=9.8m/sec^2[/tex]
It is given that elevator is ascending with acceleration of [tex]3m/sec^2[/tex]
So net acceleration on the boy = 9.8+3 = 12.8 [tex]m/sec^2[/tex] ( As the car elevator is moving ascending )
So upward force on the boy will be equal to F = m(g+a)
So [tex]F=80\times 12.8=1024N[/tex]
So upward force on the boy will be 1024 N