(6%) Problem 15: A car m-1850 kg is traveling at a constant speed of v-31 m/s. T

Question

(6%) Problem 15: A car m-1850 kg is traveling at a constant speed of v-31 m/s. The car experiences a drag force (air resistance) of Fa = 250 N. 33% Part (a) Write an expression for the power the car must produce Pi to maintain its speed. 33% Part (b) What is the power in horsepower (hp)? ,33% Part (c) The car encounters an incline which maikes an angle of kicks in and increases the power to maintain the speed of the car. What is the new power (in hp) required to maintain a constant speed? 25 degrees with respect to the horizontal. The cruise control Grade Summary Deductions

Explanation / Answer

1) Power required=Force*velocity=7750 W

2)Power=Power /746=10.4 HP

3)Net drag force=250+mgsin(25)=7912.07 N

power=245274.14 W=328.8 HP

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