Electric Field due to a Point Charge The?electric field strength?describes how strong or weak an electric field is at that point A?point charge?produces a?radial?field A charge sphere also acts lik...
Electric Force between Two Charges All charged particles produce an electric field around them This field exerts a force on any other charged particle within range The electrostatic force be...
Electric Field Strength The?electric field strength?at a point is defined as: The force per unit charge acting on a positive test charge at that point The electric field strength can be calculated ...
Defining an Electric Field An electric field is defined as a region of space in which a?charged?particle experiences a?force Hence, electric fields are a type of?force field The charged particle co...
Centripetal Force ?Centripetal force can be calculated using any of the following equations: Centripetal force is always perpendicular to the direction of travel Where: F?= centripetal force...
Maintaining Circular Motion An object moving in a circle is not in equilibrium, it is constantly changing direction Therefore, in order to produce circular motion, an object requires a?resultant fo...
Deriving Equations for Centripetal Acceleration An object moving in?uniform circular motion?travels with a constant?angular velocity?and?angular speed However, its?direction?is always changing Ther...
Angular Velocity The?angular velocity?ω?of a body in circular motion is defined as: The rate of change of angular displacement In other words, angular velocity is the angle swept out by an object i...
學(xué)習(xí)A Level的同學(xué)都知道大部分英國院校發(fā)放的本科offer是基于三門A Level成績，而每一門A Level的最高等級就是A*，在每年的Alevel考試中，取得三個A*的成績都是很多同學(xué)的目標(biāo)。那么A Level考試取得三個A*有多難...
