A 3000 kg truck is about to tow a 1250 kg car up a hill that makes an angle of α = 10° with respect to the horizontal. The rope attached from the truck to the car makes an angle of β = 25° with respect to the horizontal. The coefficient of static friction between the truck tires and the road is 0.60. Ignore friction on the car's tires due to the road. Starting from rest, they move with constant acceleration until, 400 m up the hill, their speed is 11 m/s. What is the total frictional force on the truck's tires?

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B = 25° a = 10° !!