The elevator system shown in Figure 2.4 has a combined weight for the car and occupants of 1,000 pounds (ignore forces to accelerate the car and occupants): a. What is the force in the cable? b. To raise the car 150 feet, how much work is done? c. If it took 10 seconds to travel this distance, what power was required in ft-lb/sec, hp, and kilowatts? d. If the effective diameter of the cable drum is 18 inches, deter- mine the torque in the input shaft. e. What is the rotational speed of this shaft? f. Calculate the power to turn this shaft, and compare this power to that determined in part c. Sandr ivorn chuyo pres maleson musbaubsor to base of aut borist odg 000 000 000 000 000 kirs 000 15 101 25 16 (8,00) 12al od zid FIGURE 2.4 Elevator for Problems 1 through 4. 27