what is the power consumed by a lift to take 10 persons three floors down ?
2007-11-26 15:22:43 · 4 answers · asked by Sai 1 in Science & Mathematics ➔ Engineering
It all depends on the efficiency of the system and any counterweights. Theoretically, it could be done with zero power because going down the people are doing work on the elevator instead of vice versa.
2007-11-26 15:37:29 · answer #1 · answered by Tim C 7 · 1⤊ 1⤋
That depends on how long it takes! Power is defined as work divided by time. If we assume the average weight of each person is 160 lbs. and each floor is 10' then we've got 1600 * 30 = 48,000 ft./lbs. If it takes 20 seconds to descend we've got 2400 ft./lbs./sec. * 1.355818 to convert to watts = 3254 watts/sec.
or 5.9 horsepower/sec, or whatever unit you pick!!!
2007-11-26 15:47:07 · answer #2 · answered by Barrie H 2 · 1⤊ 1⤋
welll it all depends on the weight of persons efficiency of the motors speed of the decent
2007-11-27 00:59:05 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Well the same amount of power used to place them three floors up. ...theoretically.... equation ( Force * distance)/time
2007-11-26 17:50:39 · answer #4 · answered by smacka_velly 2 · 1⤊ 2⤋