I am having difficulty formulating and answering the following: If I carry a 100

Question

I am having difficulty formulating and answering the following:
If I carry a 100 pound box up a ramp that's inclined 30degrees to a storage area thats 20 feet above the ground, and ittakes me 10 seconds to do it, how much total work did I do? (Iweigh 200 pounds). (b) How much energy did I expend (c) How much power did Iexpend?
If I carry a 100 pound box up a ramp that's inclined 30degrees to a storage area thats 20 feet above the ground, and ittakes me 10 seconds to do it, how much total work did I do? (Iweigh 200 pounds). (b) How much energy did I expend (c) How much power did Iexpend?

Explanation / Answer

Easiest way to do this is just solve the change in potentialenergy and that should be equal to your work done.
So, W=change in Ep = Ef - Ei = combined mass x acceleration ofgravity x height of the hill note* Ei is justzero
b) This is same answer as in a)
c) P = Energy / Time = your answer in a divided by 10seconds




So, W=change in Ep = Ef - Ei = combined mass x acceleration ofgravity x height of the hill note* Ei is justzero
b) This is same answer as in a)
c) P = Energy / Time = your answer in a divided by 10seconds

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