initial Ke = (1/2) 77 * 1.44
final Ke = (1/2) 77 (8.5)^2
energy gained = (1/2)(77)(8.5^2-1.44^2)
energy that should have been gained = m g (1.6) = 77 * 9.81 * 1.6
non conservative work = final energy gained - what it should have been
Catching a wave, a 77-kg surfer starts with a speed of 1.2 m/s, drops through a height of 1.60 m, and ends with a speed of 8.5 m/s.
How much nonconservative work was done on the surfer?
4 answers
Where did you get 1.44?
1.2^2 = 1.44
sorry
energy gained = (1/2)(77)(8.5^2-1.44)
sorry
energy gained = (1/2)(77)(8.5^2-1.44)
Thank you!
1 answer