A spherically symmetric object with a density of 157gcm3, Ask an Expert

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A spherically symmetric object with a density of 1.57g/cm3 and a radius of 16.5cm is falling. Assuming is has a drag coefficient of 378g/s,

(a) what is the magnitude of terminal velocity?

(b) If we were to now ignore the air's resistance to the falling object, then at what height must the object be dropped to achieve this value?

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