How much work is done to lift 3 boxes onto a 2 meter high shelf for each box has a mass of 12 kg?

Answer 1

Work equals force times distance.

Each box has a mass of 12kg, so it has a weight of 12kg(9.8N/kg) = 117.6N

The work to move each box is 117.6N(2m) = 235.2 N-m.

So the total work is 3(235.2 N-m) = 705.6 N-m

Answer 2

W = F d
so F = mg
each box F=12x10=120 N
3 boxes, is 360 N
W= (360)(2)=720 N

Answer 3

Since you are doing work against gravity, assuming you are lifting all boxes at once..

then, W=Mgh..
where M is total mass..

namely, 3 *12=36 kg.
g= 9.81 m/s^2

and h is the height, which is 2 meters.
then, its a matter of multiplaction.
(36kg)(9.81m/s^2)(2m). for a total of 706.32 Joules..

Answer 4

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Answer 5

3 * 12 * 9.8 * 2 = 705.6

Answer 6

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Answer 7

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