An elevator that contains three passengers with masses of 72 kg, 84 kg, and 35 kg respectively has a combined mass of 1030 kg. The cable attached to the elevator exerts an upward force of 1.20 x 104 N, but friction opposing the motion of the elevator is 1.40 x 103 N.
· Draw a free-body diagram of all the forces acting on the elevator.
· Calculate the net acceleration of the elevator and its passengers.
· Draw a free-body diagram of all the forces acting on the 35 kg passenger.
· Calculate the force normally acting on this passenger.
To be completely honest I'm not sure which of our formulas applies to this situation...
The Attempt at a Solution
I have drawn the force diagram below, but am not sure if I have done so correctly... does an elevator still have normal force? After that I am completely lost. I know f=ma, so maybe I can find the acceleration using the combined weight of the elevators and passengers, plus the net force on the elevator, but once again I am not sure about those forces. I'm even less sure about what is acting specifically on the 35 kg passenger. Any help is greatly appreciated!
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