A 7-cm-diameter hockey ball is launched at a speed of 50 m/s and a spin rate of 1000 RPM. Estimate the lift and drag forces, based on Fig. 8.30, and use the air properties from Table 1.1.
A soccer player kicks a 22-cm-diameter ball at a speed of 30 m/s and a spin rate of 1000 RPM with the intention of creating a curved trajectory. If the ball weight is 0.45 kg, estimate the percentage of the resulting side force-to-weight ratio. (Estimate the lift force based on Fig. 8.30 and use the air properties from Table 1.1.)
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