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To start, I'm not looking for answers. I just want to know if I'm on the right track. I'm helping my wife with her homework, and the powerpoint notes aren't great, so here we go.
The scenario is a 150lb subject walking up 4m worth of stairs in 12 seconds. First, we are supposed to convert the subject's weight into Newtons, which gives us 675 (Actually, I'm not so sure about this. Now I'm getting 667?). Then, the work in Joules. Work=forcexdistance, so W=675x4m, which would be W=2700? Then, we are supposed to convert it into Power. Power=Work/time, so P=675/12s?
Basically, are we on the right track? Thanks for any help.