a question about drag?

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a question about drag?

The speed of an automobile increases from 80 km/h (50 mi/h) to 115 km/h (71 mi/h). What is the ratio of the drag forces at the two speeds?

a. 1.2
b. 3.1
c. 2.1
d. 3.2

2006-08-07 03:32:36 · 3 answers · asked by Lenny M 1 in Science & Mathematics ➔ Physics

3 answers

not enough info. is it induced drag,parisite drag, how aerodynamic is the car? is it going straight, or turning at a constant rate.?

2006-08-07 03:41:04 · answer #1 · answered by cherokeeflyer 6 · 0⤊ 0⤋

Drag forces increase in a square function of velocity.
80^2 = 6400, 115^2 = 13225.
ratio: 2.066 (2.1)

2006-08-07 10:42:43 · answer #2 · answered by just "JR" 7 · 0⤊ 0⤋

Data missing.

2006-08-07 11:01:48 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋