The diameter of the ball is 30 cm as shown in figure. Calculate the river current speed [m/s). (NOTE: Neglect the weight of the cable. Assume; SGpall=0.20, pwater=1000 kg/m³ and Cp,ball=0,25). 30°

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Extracted text: The diameter of the ball is 30 cm as shown in figure. Calculate the river current speed [m/s). (NOTE: Neglect the weight of the cable. Assume; SGpall=0.20, pwater=1000 kg/m³ and Cp,ball=0,25). 30°