If it takes 3400j to lift a rock onto a ledge, what power is required to lift the rock onto the ledge in 4 seconds?
2007-06-20 05:16:26 · 7 answers · asked by Amy M 5 in Science & Mathematics ➔ Physics
Power is the rate at which work is done.
P = W/T
= 3400/4 W
= 850 W
2007-06-20 05:21:39 · answer #1 · answered by Som™ 6 · 1⤊ 0⤋
Power is work done divided by time. So, 3400 / 4 = 850 watts. 1000 watts is 1 Kilowatt. 1 Horsepower is 745 watts. So may be you need a 1 kw motor.
2007-06-20 12:26:49 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋
Power = Work / Time, and the unit analysis is [W] = [J]/[s]
So, you have the following:
Power = (3400 J) / (4 s) = 850 J/s = 850 Watts
2007-06-20 12:21:46 · answer #3 · answered by C-Wryte 3 · 0⤊ 0⤋
3400j/4s = 850 W
2007-06-20 12:31:24 · answer #4 · answered by xandyone 5 · 0⤊ 0⤋
power=work/time
=3400/4
=850W
2007-06-20 12:23:52 · answer #5 · answered by Shy Lad 3 · 0⤊ 0⤋
Do your own homework girl!
2007-06-20 13:08:55 · answer #6 · answered by lover of life 5 · 0⤊ 0⤋
999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999992222222j
2007-06-20 12:19:52 · answer #7 · answered by mo 1 · 0⤊ 4⤋