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Homework Statement
Homework Equations
Wnet = Ek
The Attempt at a Solution
1) That was fine.
2) I just want to confirm if this answer is right?, I got 12.28N. Used work energy theorem.
Sorry for double post, edited the title
Seems a bit high. Pls post your working.Homework Statement
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Homework Equations
Wnet = Ek
The Attempt at a Solution
1) That was fine.
2) I just want to confirm if this answer is right?, I got 12.28N. Used work energy theorem.
Sorry for double post, edited the title
Sorry my mistake, forgot something in my calculation. Anyway heres my workingSeems a bit high. Pls post your working.
Yes, that looks right.Sorry my mistake, forgot something in my calculation. Anyway heres my working
Wnet = Ek
Wg + Wf + Wn = 1/2*m(vf^2 - vi^2)
(5*9.8*sin30*20) - 20Ff + 0 = 1/2*5(12^2 - 6^2)...That 20 is the length of the incline
Ff = 11N.........Now correct?