Recent content by steve978

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    Calculate Drag Force for Tennis Ball at 251 km/h

    Homework Statement A tennis player hit a serve of 251 km.h-1 in a match. Calculate the Drag Force acting on the tennis ball. Diameter of ball is 6.5cm, density of air is 1.3 kg.m-3 and air viscosity is 1.8x10-5 kg.m-1.s-1. Homework Equations Drag Force is: Fd= \pi.d2.CD.pf.u2.1/4...