Initial PE+change in PE-KE=nonconservative work.
If you have no idea how to do these, you need a tutor.
At the college bookstore, or BarnesNoble, Schaum's Outline Series College Physics (or similar in the series) are very excellent on problems.
Catching a wave, a 65 kg surfer starts with a speed of 1.3 m/s, drops through a height of 2.10 m, and ends with a speed of 8.2 m/s. How much nonconservative work was done on the surfer?
I have genuinely no idea how to solve this problem.
4 answers
1) my teacher is really bad.
2) Is delta potential energy = mgvf - mgvi
2) Is delta potential energy = mgvf - mgvi
initial energy= 1/2*65*1.3^2
added energy= 65*9.8*2.1
add those.
subtract finalke=1/2 65*8.2^2
the remainer is the work done.
added energy= 65*9.8*2.1
add those.
subtract finalke=1/2 65*8.2^2
the remainer is the work done.
Thank you, I understand that now.
1 answer