Jack, who has a mass of 30 kg and weighs 300N, sits in a child's swing. You pull the swing back so that it is 2m above its low point, and release it. What form of energy, and how much energy, does jack has when he is pulled back and held at rest?
Second part: what form of energy, and how much energy, does Jack have as he swings through the low point (neglect air resistance and friction in the moving parts)?
at rest he going to have gravitational energy and not very much KE??? right....
at rest he going to have gravitational energy and not very much KE??? right....
Second part: what form of energy, and how much energy, does Jack have as he swings through the low point (neglect air resistance and friction in the moving parts)?
at rest he going to have gravitational energy and not very much KE??? right....
at rest he going to have gravitational energy and not very much KE??? right....