A truck enters a typical runaway lane with a speed of 57.5 mph ( 25.7 m/s ). Use the work-energy theorem to find the minimum coefficient of kinetic friction between the truck and the lane to be able to stop the truck.
Question
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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: