A stationary elevator and its contents have a combined mass of 2000kg. The elevator is suspended by a single cable. If the elevator is decending at 4.0m/s squared, what are the values of all the forces acting at this point?

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Remember that . Here the forces acting in the elevator are the tension in the cable (which is positive value because it operates in the positive y direction) and the force of gravity in the negative y direction. You have a value for (be careful to use the correct sign), now solve for .