As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 24.8 m. What is the coefficient of kinetic friction between your tires and the wet road?
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Hello
Set kinetic energy equal to friction work
friction work = friction force* distance = μmg*d
kin. energy = 1/2 mv^2
1/2 mv^2 = μmg*d
v^2 = 2μgd
μ = v^2/(2gd)
μ = 14^2/(2*9.81*24.8)
μ = 0.4028
Regards
Set kinetic energy equal to friction work
friction work = friction force* distance = μmg*d
kin. energy = 1/2 mv^2
1/2 mv^2 = μmg*d
v^2 = 2μgd
μ = v^2/(2gd)
μ = 14^2/(2*9.81*24.8)
μ = 0.4028
Regards