Snowboarder velocity physics problem

[vanessajune77]

Homework Statement

(Points: 10.0) The [a] kilogram snowboarder stands at the top of a slope that rises 27.14 meters above the valley floor. After sliding down the slope, (s)he glides up a 6 meter long jump that rises 3 meters above the valley floor. Calculate the snowboarder's speed at the top of the ramp if the coefficient of friction of the board on the snow is 0.15 and the base of the slope is 16.30 meters out from the edge.

Homework Equations

sum of forces Or
Kinetic energy?

The Attempt at a Solution

22.42 m/sI added the gravataional energy, thermal energy and kinetic energy and got the wrong answer.

I also tried to use v=at+vi and got the wrong answer. I ahve the right answer I just don't know how to get there.

 

[PhanthomJay]

You'll need to show some attempt at a solution for assistance, per forum rules. Energy methods work best here.

 

[vanessajune77]

I fixed my entry

 

[vanessajune77]

I think one of the things I am doing wrong has to so with the friction coefficient
but I don't know how to move on because I don't have the weight of the person

 

[PhanthomJay]

I think one of the things I am doing wrong has to so with the friction coefficient
but I don't know how to move on because I don't have the weight of the person

Perhaps you don't need her weight. I've asked the moderators to move this to the Intro Physics section. That doesn't imply this problem is 'easy', it's just that the Advance Physics section is for Graduate School ( or late undergraduate) Physics questions.

You need to start by writing out the law of conservation of total energy.

 

[vanessajune77]

Thanks for taking the time to tell me how to write my question and where my question belongs. it would be nice if you actually helped me, though. :)

 

[Redbelly98]

I think one of the things I am doing wrong has to so with the friction coefficient
but I don't know how to move on because I don't have the weight of the person

As PhanthomJay said, using energy methods should work here. Calculating the work done by friction on the snowboarder would be a good start.