sayyy+wuhhh!

toc
 * =Circular Motion=
 * === **Definitions:** ===
 * Circular Motion-the movement of an object constant speed around a circle with fixed radius.
 * axis- straight line around which rotation takes place.Rotation-object turns the internal axis.
 * Revolution- object turns around the external axis
 * linear speed-distance\time
 * Tangential speed-speed along a circular path.
 * Rotational speed-number of rotation per unit of time.
 * === Formulas: ===
 * V=rW
 * Fnet=mv2/r
 * Circumference =2(3.14)r =(3.14)d
 * Distance-traveled=Circumference
 * Centripeta Acceleration= Ac=v2
 * Revolutions=Distance/circumference
 * period(T)


 * =Newton and Gravity=
 * -Isac Newton believe that gravitational force were responsible for the acceleration of objects on the moon and on the earth.
 * -Newton conclude that any two objects in the universe exert gravitational attraction on each other.
 * -Newton's law of universal Gravitational applies to ALL objects


 * **Universal Gravitation and Mass**
 * -As the mass of either object or both object increase, the force of gravitational attraction increase.
 * Effect of mass on Gravity
 * 1m 1F 1m
 * 1m 2F 2m
 * 2m 4F 2m
 * 1m 3F 3m


 * =Universal Gravitation and Distance=
 * As the distance separating 2 objects increases, the force of a attraction is exponentially smaller.


 * =Universal Gravitation Formula=
 * G = Universal Gravitation constant
 * G = 6.67x10(-11)


 * =Friction=
 * ===Definitions:===
 * the force exerted by the scale is called the apparent weight.
 * weightless- no contact forces pushing up on you.
 * kinetic friction force- the force exerted on one surface by the other surface are in relative motion.
 * ===Formulas:===
 * the weight force is defined as Fg = mg.Fg changes when varies.
 * Kinetic Friction Force- Ff kinetic = [[image:http://www.regentsprep.org/regents/physics/phys01/friction/mu_k.gif width="33" height="35" caption="external image mu_k.gif"]] FN
 * Static Friction Force- 0 ≤ Ff . static ≤ [[image:http://www.regentsprep.org/regents/physics/phys01/friction/mu_s.gif width="30" height="35" caption="external image mu_s.gif"]]FN


 * =Coulomb's Laws=
 * The relationship among electrical Force, charges, and distance.
 * The relationship among electrical Force, charges, and distance.


 * ===Formulas:===
 * F = KG aq B/D(2)
 * F = Force(N)
 * K = (electrical proportionality constant)
 * 9.0x10(9) N x m(2)/c(2)
 * q = charge (C for Coulomb)
 * d = distance (m)
 * Charge of 1 proton is t1.6 x 10 (-19) c
 * Charge of 1 electron is - 1.6 x 10 (-19) c
 * The charge (g) of a particle is NOT a vect or quantity.
 * Therefore,when ir is a proton or electron "POSITIVE" OR "NEGATIVE" that tells whether it is a proton or electron, but is NOT part of the magnitude of the charge.
 * __ DO NOT PUT THE NEGATIVE IN THE FORMULA! __


 * =Electric Field=
 * a vector quantity that relates the force exerted on a charge to the size if the charge.
 * The magnitude of the electric field is measured in N/C (Newtons/Coulomb)
 * Away from a positive charge object.
 * Toward a negative charged object.


 * ===Formulas:===
 * [[image:http://www.symbols.com/pics/small/28/2801.gif width="14" height="12" caption="2801"]]V = Wong/q W = Work (J)
 * V = potential differences (V) q = test charge (C)


 * =Grounding=
 * Touching a body to earth eliminate excess charge.


 * =Electric Current=
 * Flow of charged particles.
 * The flow will stop when the potential differences is zero.
 * Current always flow from a higher potential differences (voltage) to a lower potential differences.


 * =Electrical Energy Sources=
 * Voltaic or galvanic cells (dry cells) convert chemical energy to electrical energy.
 * Photo voltaic cell charges solar energy into electrical energy.
 * Generators convert kinetic energy into electrical energy.