If the driver first applies the brakes 150 ft from the tree

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A car is traveling at sea level at 88 mi/hr on a 4% upgrade before the driver sees a fallen tree in the roadway 150 ft away. The coefficient of road adhesion is .8. The car weighs 2500 lb, has a drag coefficient of .35, a frontal area of 16 ft^2 and a coefficient of rolling friction approximated as .017 for all speed conditions. The car has an antilock braking system that gives it a braking efficiency of 100%. If the driver first applies the brakes 150 ft from the tree, at what speed will the car be traveling when it reaches the tree? Include the effect of aerodynamic resistance.

Reference no: EM13637045

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