Time for skier to escape avalanche on 30° slope with two friction coefficients

[beocom6000yello]

an avalanche begins on a ski slope. the mountain is 30 degrees above horizontal. a skier is 100m downhill on path of avalanche
1. how much time does skier have to move out of way if no friction?
2. how much time does skier have if Uk is 0.1?

answer= 1. 6.4 s 2. 7.03 s


can someone please help me? the equation i am using is Fk = UkN

 

[_Mayday_]

If this is homework I would advise taking it to the homework section of the site where you may get more help.

 

[PhanthomJay]

There's no friction in the first case. You've got to show some work as to how you might approach this problem.