The work done in lifting 40 kg of bricks to a height of 12 m on a building under construction is?

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a. 4704 J
b. 392 J
c. 2352 J
d. 480 J

2007-02-05 03:58:33 · 2 answers · asked by kacwccj 3 in Science & Mathematics ➔ Mathematics

W=Fxd

W= 40*9.8 *12

The answer is A

2007-02-05 04:03:26 · answer #1 · answered by Anonymous · 0⤊ 0⤋

If 40kg is the mass of the bricks their weight will be 40*9.8 Newton
=392 N and the work done is 392*12=4704 J
The answer is a)

2007-02-05 14:50:43 · answer #2 · answered by santmann2002 7 · 0⤊ 0⤋