For the flow field given in cartesian coordinates by u = 2y 3y2z 3ar, w=0: (a) is the flow steady? (b) is the flow compressible or incompressible? (c) if viscous and gravitational forces are negligible, find the pressure gradient

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.