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...