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:lol: :lol: :lol: :lol: :lol:larryflo said:Push!
larryflo said:Push!
The same amount of work gets done, but the bicycle is bearing the weight, and the pusher only has to overcome its rolling friction. A baseball batter does not work when he swings, but I suspect that his caloric usage is substantial. I am not sure that the definition of work for physics translates into exertion by a pilgrim. Giant steps up a steep hill are more exhausting than small steps, but the work is the same since the mass and distance are the same. While my back hurts just thinking about pushing a bicycle up a steep incline with my torso angled over the handle bars, I think the exertion would be less than carrying the same load on my back. I suppose a bicyclist who has both carried his bicycle and pushed it could weigh in with his/her perception.though, laws of physics and all that ... if you rise 300 metres either by walking up a long hill or cycling up a long hill you are still lifting the same amount of weight vertically 300 metres
Br. David said:(crikey! - hope I'm right about this ...)