3.8. example. incompressible liquid of constant density p is contained within a region bounded by two concentric rigid spherical surfaces of radii a, b (a < b).

3.8. Example. Incompressible liquid of constant density p is contained within a region bounded by two concentric rigid spherical surfaces of radii a, b (a < b). The fluid is initially at rest. If the inner boundary is suddenly given a velocity Uk, where k is a constant vector, show that the outer surface experiences the impulsive force 27tpUa'b b-a