A freight elevator, including its load, has a mass of 1 Mg. It is prevented from rotating due to the track and wheels mounted along its sides. If the motor M develops a constant tension T = 4 kN in its attached cable, determine the velocity of the elevator when it has moved upward 6 m starting from rest. Neglect the mass of the pulleys and cables.

Sample Notes EE 212 AC Steady State Power Different types of AC power 1. Instantaneous Power [Watts] 2. Average Power (Active Power, Real Power) [Watts] 3. Reactive Power (Imaginary Power) [VAR] 4. Complex Power [VA] 5. Apparent Power [VA] 6. Power Factor Instantaneous Power p(t) [Watts] p(t) = v(t) i(t); t = time 1. If current i(t) is entering the device then p(t) is positive and the device is absorbing power 2. If current i(t) is leaving the device then p(t) is negative and the device is supplying power