Question

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.

Answer 1

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

Step-by-step explanation: