Force, A push or pull exerted on an object., Attractive force, The force by which one object or particle attracts another., Repulsive force, The force by which one object or particle repels another., Contact force, A force that is exerted only when two objects are touching., non-contact force, A force that one object can apply to another object without touching it., Isaac Newton, British Mathematician known for his Law of Universal Gravitation and his 3 Laws of Motion., Newton (SI Unit), SI Unit of force. The force needed to accelerate one kilogram of mass at the rate of one meter per second squared in the direction of the applied force., Gravity, A force of attraction between objects that is due to their masses (greater mass = greater attractive force)., Inertia, The tendency of an object to resist a change in motion., F = m x a, The formula for calculating force (Force = mass x acceleration), Mass, The amount of matter in an object., Weight, A measure of the force of gravity on an object., Matter, Anything that has mass and takes up space, Energy, The ability to do work or cause change, Potential energy, stored energy, Kinetic Energy, the energy an object has due to its motion, Net force, The overall force on an object when all the individual forces are added up., Friction, The force that resists motion when the surface of one object comes in contact with the surface of another., Speed, The distance an object travels per unit of time, Acceleration, The rate at which velocity changes, velocity, Speed in a given direction, Joule, SI unit of energy, grams and kilograms, SI units of mass., SI Units, International System of Units (bascically the metric system)..

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