Explanation:
Sorry but I don't Understand question
Answer:
I put the answer
Can you see it
Work done by friction force= change in total Energy
so,
W= (friction force)*d= (mu*N)*(35)
mu*m*g*35= 1/2*m*v^2
mu= 0.5*(25.7)^2/(9.81*35)
solving it,
mu = 0.9618
0.7
1 + 0.6 = 0.7 I think
hope this helps
