Explain what centimeters, kilometers, and millimeters are.

How is the gravitational force related to the distance between two objects?

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.

In which of the following is positive work done by a person on a suitcase