Physics, 04.11.2019 17:31 ruinmylife
Astring pulls a 9 kg box horizontally across a table with a force of 50 n. the box has a coefficient of friction with the table of 0.45. what is the net force of the box?
a. 90 n
b. 40 n
c. 50 n
d. 10 n
Answers: 3
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The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.
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Astring pulls a 9 kg box horizontally across a table with a force of 50 n. the box has a coefficient...
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