Calculate the power developed by the tractor.
2007-12-13 08:08:29 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
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Mass of lawn tractor = m =120 kg
Acceleration due to gravity = g
Slant height = s =12 m
Incline angle =O =21 degree
vertical height = h = s* sin O =12*sin21
vertical height = h =4.3004 m
time = t =2.5 s
Work done =w = change in potential energy = mgh
Power =P =w/t
Power =P =mgh =120*9.8*4.3004/2.5
Power =P =2022.9 W
The power developed by the tractor is 2022.9 W
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2007-12-13 08:24:26 · answer #1 · answered by ukmudgal 6 · 0⤊ 0⤋
No friction, so all we care about is the change in height.
h = ( 12 m ) ( sin 21 degrees )
The work done is
W = mgh
The power is that work divided by elapsed time
P = W / t
2007-12-13 08:12:55 · answer #2 · answered by jgoulden 7 · 0⤊ 0⤋