How much work is needed to move a 150 kg refrigerator to the 3rd floor
2007-12-13 07:57:42 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Work is force applied F along the displacement D. In this case force applied equal to the refrigerator's weight w=mg and displacement to height raised h.
W= wh= 150 x 9.81 x 8=
W=11,800J
2007-12-13 08:05:20 · answer #1 · answered by Edward 7 · 1⤊ 0⤋
Work = force multiplied by distance. In these abstract problems we pretend that the work is done only against the force of gravity and we ignore forces involved in gouging the walls and tearing up the carpet on the stairs.
W = ( 150 kg ) ( 9.8 m / s² ) ( 8 m )
2007-12-13 16:07:40 · answer #2 · answered by jgoulden 7 · 0⤊ 0⤋
It depends. Are the movers being paid by the hour or the job?
2007-12-13 16:05:27 · answer #3 · answered by Zef H 5 · 1⤊ 0⤋