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toc //**Physics Vocabulary**//

//** Circular Motion Notes **// //** __Vocabulary__ **// //** Axis- Straight line around which rotation take place. **// //** Rotation- Object turns around an internal axis. **// //** Revolution- Object turns around an external axis. **//

//** __Rotational Speed__ **// //** __Lineer Speed-__ Distance/Time **// //** __Tangential Speed__- # of rotations per unit of time. **// //** Tangential Speed is a radial distance times the rotational speed V=RW. **//

//** __Centripetal Force__- Force that causes an object to follow circular path. **//



**//Universal Gravitation & Distance//** **//As the distance seperate two objects increase, the force of attraction is expontially smaller.//** **//Universal Gravitation Formula//** **//Fgrav= Gm1 M2/ J2//** **//G= Universal Gravitation Constant//** **//G= 6.67// * 10 '11**

__**// Universal Gravitation & Mass //**__
 * // As the mass of either object or both onjects increase, the force of gravitational attraction increases. //**


 * //__ Friction __//**
 * // Static Friction Force: A second horizontal force, opposit in direction to your force, and equal in size. //**
 * // Kinetic Friction Force: The force exerteg on one surface are in relative motion. //**
 * // Normal Force: Fn force perperdicular to the surface. //**
 * // Kinetic Friction Force Kinetic=MKFn //**
 * // MK- Coefficient of kinetic friction proportionality constant called kinetic coefficient of friction. //**
 * // Ff= Force due to friction. //**

Electric Fields Electric Field- A vector quantity that relates the force exerted on a charge to the size of the charge. Electric Field Lines- Direction of arrows indicate the charge of the field. Electric current- Flow of charged particles current always flows from a higher potential difference (voltage) to a lower potential difference.

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