Question

(11%) Problem 6: To maintain a constant friction of the road (the rolling resistance). Assume that the drag coefficient for a Toyota Camry is 0.28, while for a Hummer it is 0.64. speed, the force provided by a car's engine must equal the drag force plus the force of The density of air at this temperature is 1.21 kg/m Randomized Variables S66 km/h S92 km/h @theexpertta.com- tracking id: 4N89-19-F9-48-AF40-16204. In accordance with Expert TA's Terms of Service, copying this information to any solutions sharing website is strictly forbidden. Doing so may result in termination of your Expert TA Account. 25% Part (a) What is the drag force at 66 km/h for a Toyota Camry? (Drag area is 0.70 m2) X Attempts Remain F 68.6 25% Part (b) What is the drag force at 92 km/h for a Toyota Camry? (Drag area is 0.70 m2) Grade Summar FD Deductions Potential sin Submissions cos( tan HOME Attempts remain (4% per attempt cotan asin acos 4 5 6 sinh acotan() 2 3 detailed view atan) cosh() tanh) cotanh 0 + END CLEAR Degrees Radians BACKSPACE I give up! Submit Hint Hints: 2% deduction per hint. Hints remaining: Feedback: 1% deduction per feedback 25% Part (c) What is the drag force at 66 km/h for a Hummer H2? (Drag area is 2.44 m 25% Part (d) What is the drag force at 92 km/h for a Hummer H2? (Drag area is 2.44 n

Answer 1

Drag force is  

pu CDA FD 2

part (a)

drag force on camry at

66 km/h

1.21 (66 5/18) 0.28 0.70 FD 39.86 N

part (b)

drag force on camry at ​​​​​​​

92 km/h

1.21 (92 5/18) 0.28 0.70 FD 77.44 N

part (c)

drag force on Hummer at ​​​​​​​

66 km/h

1.21(66 5/18) * 0.64* 2.44 317.55 N FD

part (d)

drag force on Hummer at

92 km/h

1.21(92 5/18) * 0.64* 2.44 FD 617.02 N