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Home Q & A Board Science-Related Homework Help Physics
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rk_9897 rk_9897
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12 years ago
F = .35*A*(.5*p*v^2)

where A is the projected area of the car 23.3 ft^2, p is the density of air .0800 lb/ft^3, and v is the velocity of the car. Determine the power in hp to maintain a steady speed of 60 mph. Assume no rolling resistance.
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#1
12 years ago
Crazy English units!! Work out v in ft/sec plug the numbers in and you should get F in lbs force, I guess. Power is just F times v, so work that out and try to find the conversion factor for english units to horse power (1hp = 550 ft.lb./s I think) 60 mph is about 88 ft/s (15 mph = 22ft/s)
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firepainfirepain
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12 years ago
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