Concepts of Motion


definition - You do not feel weight. Example: Astronauts feel weightlessness because in space there is not a lot of gravity.


definition- a combination of mass and speed. PICTURE- The roller coaster needs to be heavy and fast because if it isn't then the rollercoaster will get stuck on a loop.

Newton's Law of Universal Gravitation

definition- Every partical in the universe exerts gravitational pull. PICTURE- The arrows represent the gravitational pull of the Earth.