9702/12 Physics May Jun 2024 Online Test| Cambridge AS & A Level Grade MCQ
CIE
AS & A Level
Physics (9702)
شهریور
2024
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Marila Lombrozo The drag coefficient ${C_d}$ is a number with no units. It is used to compare the drag on different cars at different speeds. It is given by the equation
${C_d} = \frac{{2F}}{{\rho {v^n}A}}$
where F is the drag force on the car, ρ is the density of the air, A is the cross-sectional area of the car and v is the speed of the car.
What is the value of n?
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