Physics, 17.11.2020 16:20 mercedezosborne
A girl pulls a sled with a force of 40 N. The weight of her sled is 80 N. A boy pulls a different sled with a force of 39 N. The weight of his sled is 70 N. Which sled exerts the force of greater magnitude on the child dragging it?
A. The girls sled exerts the force of greater magnitude.
B. The boys sled exerts the force of greater magnitude.
C. The forces exerted by the sled are of equal magnitude
D. not enough information has been provided to answer the question.
Answers: 3
Physics, 21.06.2019 16:10
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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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A girl pulls a sled with a force of 40 N. The weight of her sled is 80 N. A boy pulls a different sl...
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