Achild is sitting on the seat of a swing with ropes 5 m long. her father pulls the swing back until the ropes make a 30o angle with the vertical and then releases the swing. if air resistance is neglected, what is the speed of the child at the bottom of the arc of the swing when the ropes are vertical?
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If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?
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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.
Answers: 2
Achild is sitting on the seat of a swing with ropes 5 m long. her father pulls the swing back until...
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