acceleration, How quickly an object speeds up, slows down or changes direction., critical velocity, The speed needed at the top of a loop for a car to make it through the loop without falling off the track, force, Any push or pull., friction, A force caused by a rubbing motion between two objects., g-force, Short for gravitational force. The force exerted on an object by Earth's gravity., gravitational constant, The acceleration caused by Earth's gravity. Is equal to 9.81 m/sec2., gravity, A force that draws any two objects toward one another., kinetic energy, The energy of an object in motion, which is directly related to its velocity and its mass., potential energy, The energy stored by an object ready to be used, velocity, A combination of speed and the direction in which an object travels., Law of Conservation of Energy, Energy is never created or destroyed, it just transforms into other forms of energy., Thermal Energy, A product of most other forms of energy. A product of friction., Electrical Energy, The energy of moving electrons., Radiant Energy, Light energy. Electromagnetic radiation from light bulbs or the sun., Chemical Energy, Energy stored in chemical bonds; transferred during chemical reactions..

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