- #1
peyton
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Homework Statement
if a skier goes down a hill that is 20m high and 70 m long perpendicular to the height... and she weighs 50kg and her intial veloctiy is 5 m/s. how fast is she going at the bottom if the force of gravity up the hill is 40N??
I just don't get it!
PLease help me
Homework Equations
total energy= kinetic energy + gravitational energy
work = Fd
The Attempt at a Solution
Et= .5x50x(5x5)+ 50 x 9.8 x20
= 10425
and i don't know where to go from here please help me!
i have a test tomorrow and i don't understand