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Question: 5 the drag force fd imposed by the surrounding air...

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5. The drag force, Fd, imposed by the surrounding air on an automobile moving with velocity V is given by 1 172 2 where Cd is the drag coefficient, A is the projected frontal area of the vehicle, and p is the air density. For Cd-0.42, A-2 m2, and p 1.23 kg/m3, (a) calculate the power required (kW) to overcome drag at a constant velocity of 100 km/h, (b) compute and plot the required power (kW) to overcome drag as a function of velocity, for V ranging from 0 to 120 km/h.6. Jumbo the Elephant is working on a drive train for his new remote-controlled car, which consists of gear 1, gear 2, a pair of shafts, and two wheels. The force against the ground to move the entire vehicle up a hill is F, and the vehicle is traveling at a constant speed V.r3 2 stor a) b) c) (2 pt) What is the angular speed of rotation wi of gear 1 with gear 2 of radius r2 and the wheels of radius rs making perfect contact with the road as the vehicle travels at linear speed V? (l pt) What is the total power required to move the car up the hill in term of F and ? (2 pt) With gear 1 spinning at wi, what torque needs to be applied to gear 1 to keep the vehicle moving up the hill at a constant speed? Hint: We assume the power supplied to gear 1 is the total power required to move the car up the hill 7. An AISI 1030 steel part is annealed to 126 Bhn (Brinnel Hardness). Estimate the values of Su and Sy for this part.

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