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Homework Statement
Homework Equations
ΔE_{system} + ΔE_{surroundings} =0
The Attempt at a Solution
I have solved 11a and got 5m/s.
I can do 11b just by just jumping to E_{k} = Fs (from the work kinetic energy theorem), but I would like to do it formally from first principles using the Law of Conservation of Energy.
I would then like to make use of
ΔE_{system} + ΔE_{surroundings} =0
and then make use of ΔE_{system} = ΔU + ΔE_{k} + ΔE_{p}
and then make use of ΔU = W + Q
and then introduce W = Fs
then solve for F.
However I am not sure where to put the system boundary so this is solvable. Then the question of the pluses and minuses.
Many thanks
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