Where would you expect to find the center of gravity in a plastic ruler

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

The heliocentric and the geocentric models of the solar system included these central principles

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive