Centripetal force is a force directed towards the center of curvature of an object's curved path. Centripetal acceleration is proportional to the square of an object's speed and inversely proportional to the radius of its path. Newton's law of universal gravitation states that every object in the universe attracts every other object with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.

1. Centripetal Force

4. Magnitude of Centripetal Force

5. Banking Angle

6. Motion in a Vertical Circle

8. Acceleration of Gravity