The Kutta-Joukowski theorem, Equation
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- Complete Solutions Dynamic of Rigid Bodiesarrow_forwardusing the concept and formulas in dynamics of rigid bodiesarrow_forwardUse vectors to explain why it is difficult to hold a heavy stack of books perfectly still for a long period of time. As you become exhausted, what eventually happens? What does this mean in terms of the forces acting on the books?arrow_forward
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- A circular log floating in water is neutrally buoyant. Our ancestors found that by having half a log with semi-circular cross section and hollowing out the interior, it became stable so that they could use it to migrate across oceans. The reasons for it to become stable are: (i) (ii) (iii) (iv) It lowers the centre of gravity G so that it is below the centre of buoyancy B. It lowers the centre of gravity G so that it is below the metacentre M. It increases the metacentric radius BM. It enables the shifting of the centre of buoyancy B laterally to produce a restoring moment when it is tilted. (A) (B) (C) (D) (i) and (ii) (ii) and (iii) (iii) and (iv) (iv) and (i)arrow_forwardA tremendous force is generated when waterfreezes into ice and expands in volume by 9.0%. Suppose a 1.000-m3cube of liquid water freezes into ice that is 1.000 m on a side by1.090 m tall. How many 68-kg students would the ice be able tolift? Determine this by calculating the amount of force on the top1.000-m2face that would be required to squeeze 1.090 m3of iceback to 1.000 m3, assuming all of the volume change occurs alongthe vertical directionarrow_forwardThe largest animal is found in sea as it requires no energy to support its weight by using hydrostatic principle. However bird has to support its own weight by using Bernoulli principle to create pressure difference while in flight. Bird cannot be very large and there are also fewer species of large bird than small bird. The reasons are: (i) (ii) There is less food in the air than in the sea. The bone structure of the bird has to be light and it is structurally more difficult to maintain the strength to weight ratio as the bird becomes larger. The lift and drag on a bird is due to viscous and pressure forces. They are surface forces proportional to the length square while the weight of a bird due to gravity is proportional to the length cube. At large length scale, length square is much smaller than length cube and it becomes difficult to generate lift to support a bird in flight. (A) (B) (C) (i) and (ii) (i) and (iii) (ii) and (iii) All of the abovearrow_forward
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- International Edition---engineering Mechanics: St...Mechanical EngineeringISBN:9781305501607Author:Andrew Pytel And Jaan KiusalaasPublisher:CENGAGE L