Part A What is the drag force on a 1.6 m wide. 1.4 m high What is the drag force

Question

Part A What is the drag force on a 1.6 m wide. 1.4 m high What is the drag force on a 1.6 m wide, 1.4 m high car traveling at 14 m/s (31 mph)? Suppose that the density of air is 1.2 kg/m3 Express your answer to two significant figures and include the appropriate units. D-Value Units Submit Give Up Incorrect; Try Again; 3 attempts remaining Part B What is the drag force on a 1.6 m wide, 1.4 m high car traveling at 42 m/s (94 mph)? Suppose that the density of air is 1.2 kg/m3 Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

First of all we have to know the formula for drag force
FDrag = (1/2)pCDAV2   where p is the denstiy of air , CD is the coefficient of drag , A is the projected area and V is the velocity of car
since the value of CD is not given therefore assuming it as 1.
(a) FDrag = (1/2)(1.2)(1.6*1.4)(14)2 = 263.424 N
(b) FDrag = (1/2)(1.2)(1.6*1.4)(42)2 = 2370.816 N

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