Which of the following best describes a liquid? O A. indefinite shape, definite volume
O B. indefinite shape, indefinite volume
O C. definite shape, definite volume
OD. a combination of positive charged ions and free electrons

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.