F14-9. If the motor winds in the cable with a constant speed of v = 3 ft/s, determine the power supplied to the motor. The load weighs 100 lb and the efficiency of the motor is ɛ = 0.8. Neglect the mass of the pulleys. D. B. v = 3 ft/s

Is it correct to conclude that one engine is doing twice the work that another is doing just because it is generating twice the power? Yes. No.

An electric winch causes an elevator to move between floors of a ten-story building. The mass of the elevator with a maximum load of passengers is at most 500. kg. The elevator moves a speed of 0.304 m/s taking a time of 115.s to travel the distance of 35.0 m. What is the minimum power rating this winch would have? Select one: a. b. C. d. 1.49 x 10³ W 1.30 x 10¹ W 4.90 x 10³ W 1.72 x 105 W

Prob. F14-8 F14-9. If the motor winds in the cable with a constant speed of v = 3 m/s, determine the power supplied to the motor. The load weighs 100 N and the efficiency of the motor is ɛ = 0.8. Neglect the mass of the pulleys. C D B. A lv= 3 m/s %3D E Prob. F14-9