This may be a unfamiliar problem for those of you from warmer countries, but here in the north we sometimes have to shovel snow. This task is about snow shoveling: -------------- It has fallen 10 cm of snow. Estimate the amount of work needed to shovel a sidewalk free of it. The sidewalk is 10 m long and 1.5 m wide. A liter snow weighs almost the same as 100 ml water. State all your assumptions. -------------- I feel like I have to make at least 5-6 assumptions, is that correct or is it an easier way to do it? To estimate the amount of work, I have to make assumptions about length and acceleration. But also a lot more, in order to make it realistic. Though I could of course say that I shovelled it 10 meters away, using a horisontal force which gave an average acceleration of 2 m/s^2. 'Giving me the expression: W = F*s = m*a*s = (150kg)*(2 m/s^2)*(10m) = 3000 J I will appreciate all the help I can get!