Increase to the visible part
D is the answer because you cause heat by exerting energy
Answer:
Work done by friction force= change in total Energy
so,
W= (friction force)*d= (mu*N)*(35)
so,
mu*m*g*35= 1/2*m*v^2
so,
mu= 0.5*(25.7)^2/(9.81*35)
solving it,
mu = 0.9618
Explanation: