What is the kinetic energy of a satellite of mass m that orbits the earth of mass m in a circular orbit of radius r?

Which changes of state do the labels represent? a: b: c:

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.

Smallest intensity of a stimulus that you can detect 50 percent of the time is