The pickup truck weighs (3220 mathrm{lb}) and reaches a speed of (30 mathrm{mi} / mathrm{hr}) from rest

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The pickup truck weighs \(3220 \mathrm{lb}\) and reaches a speed of \(30 \mathrm{mi} / \mathrm{hr}\) from rest in a distance of \(200 \mathrm{ft}\) up the 10-percent incline with constant acceleration. Calculate the normal force under each pair of wheels and the friction force under the rear driving wheels. The effective coefficient of friction between the tires and the road is known to be at least 0.80 .

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