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Question: 10 disk ellipsoid 1 075 stokes lawcp 24r sphere ...

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10 Disk Ellipsoid 1 075 Stokes law:Cp 24/R Sphere เจ้ Elipsoid 1:18 Airship hui 10 Rajah 2/Figure 2

a) Terangkan mengapa permukaan bola golf dikasarkan Explain why the surface of a golf ball is dimpled. (3 markah/marks) b) Suatu sfera pejal dengan garispusat 21.5 cm dilepaskan daripada sebuah kapal terbang. Dengan menggunakan graf yang diberi dalam Rajah 2, tentukan halaju tamatan untuk sfera ini. Berat sfera ialah 71 N, ketumpatan udara ialah 0.907 kg/m dan kelikatan kinematik udara ialah 1.87x105 m2ls. A solid sphere of diameter 21.5 cm is released from a plane. Using the graph given in Figure 2, determine the terminal velocity of the sphere. The weight of the sphere is 71 N, density of the air is 0.907 kg/m, and the kinematic viscosity of the air is 1.87x10 m/s. (12 markah/marks)

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