A man weighing 125kg walks 15m up to the top of a plane inclined at 30 degree to the horizontal.
find A) Work he has done B) the increase in Potential Energy C) If he wants to go to the top of the plane, what is his horsepower?
PEo + KEo = PEf + KEf
P = W/T = Fv
1HP = 746 W
The Attempt at a Solution
I found A) and B) which gives 9188 Joules, for the C) part I'm having more difficulty. I thought that by using the law of conservation of energy I could find the initial velocity and then multiply by mg to give the power to then convert the watts to HP. Although, I doubt that this would be it. Any thoughts? Thanks a lot