A3: A 75 kg man stands on a spring scale in an elevator (lift) as shown in Figure 3. During the first 3 seconds of motion from rest, the tension T in the hoisting cable is 8300 N. The total mass of the elevator (lift), man and scale is 750 kg and the linear acceleration cannot be assumed constant. a) Draw Free Body Diagram showing all parameters. b) Find the reading R of the scale in newtons during this interval. c) Determine the upward velocity of the elevator (lift) at the end of the 3 seconds. y Figure 3 R