alex+collins

= = Circular Motion: The movement of an object at constant speed around a circle with fixed radius. Newton and Gravity: Newton concluded that any two objects in the Universe exert gravitational attraction on each other. Coulomb's Law; = the relationship among electrical forces, charges and distances. > > Centripetal Force: Force that causes an object to follow a circular path > Circular Motion: the movement of an object at costant speed around a circle with fixed radius > Axis: Straight line around which rotation takes place > Rotation:Object turns around on external axis > Tangential speed: is radial distance times the rotational speed > Coulombs law: the relationship among electrical forces, charges, and distance > Electric Potential Diference: Causes Charges to Move > Grounding:Touching a body to earth to excess charges > Electric Current: Flow of Charges particals > There are several types of friction:
 * Axis: Straight line around which rotation takes place.
 * Rotation: Object turns around an internal axis.
 * Revolution: Object turns around the external axis.
 * Rotational Speed: number of rotations per unit of time. Ex Carousel horses travel at same rotation speed but different trangential speed.
 * Trangential Speed: Is radical distance times the rotational speed. V=rw
 * Centripetal Force: Force that causes an object to follow a circular path.
 * Centrpental Acceleration: Always points toward the center of the circular motion.
 * Gravity: is a constant force exerted by objects that have mass.
 * Weight: is the pull of gravity
 * Universal Gravitational and Mass: As the mass of either object or both object increases, the force of gravitational attraction increase.
 * Universal Gravitational Distance: As the distance seperating two objects increase, the force of attraction is exponentially smaller.
 * Electrical Field; A vector guantity that relates the force exerted on a charge to the size of the charge. The magnitude of the electric field is measured in N/C (Newtons/Coulomb)
 * Electrical Lines: Direction of arrows indicate the charge of the lines.
 * Grounding: Touching a body to earth to eliminate excess charge.
 * Electric Current; Flow of charge particles. Current always flows from a higher potential difference (voltage) to lower potential difference. The flow will stop when the potential difference is zero.
 * Electrical Energy Source; Voltaic or galvanic cells (dry cells) converts chemical energy to electrical energy.
 * **Definitions**
 * **Friction** is the force resisting the relative motion of solid surfaces, fluid layers, and/or material elements sliding against each other. It may be thought of as the opposite of "slipperiness".
 * **Friction** is the force resisting the relative motion of solid surfaces, fluid layers, and/or material elements sliding against each other. It may be thought of as the opposite of "slipperiness".
 * **Dry friction** resists relative lateral motion of two solid surfaces in contact. Dry friction is subdivided into //static friction// between non-moving surfaces, and //kinetic friction// between moving surfaces.
 * **Fluid friction** describes the friction between layers within a viscous fluid that are moving relative to each other.
 * **Lubricated friction** is a case of fluid friction where a fluid separates two solid surfaces.
 * **Skin friction** is a component of drag, the force resisting the motion of a solid body through a fluid.


 * __// THIS HAS BEEN ANOTHA OD AND ALEX ELCLUSIVE HAHAHAHA!!!!!! //__**