Friction and final speed

Question

So the angle is 14°, a=1.42m/s2, Vf=47.7m/s, coeffiecient friction=0.1 and the hill is 800 meters.....

 

Consider how the work done by friction will reduce the final speed

 

 

I set up an equation, but don't know how to solve for the displacement.      v= (square root of) 2(9.8m/s2)(194m)-0.1(9.8m/s2)cos14(d)

 

 

 

Answer 1

Meg,

 

  Could you give a clearer explanation for the problem?  Thanks.