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...
学习A Level的同学都知道大部分英国院校发放的本科offer是基于三门A Level成绩，而每一门A Level的最高等级就是A*，在每年的Alevel考试中，取得三个A*的成绩都是很多同学的目标。那么A Level考试取得三个A*有多难...
Radians A?radian?(rad) is defined as: The angle subtended at the centre of a circle by an arc equal in length to the radius of the circle Radians are used whenever describing the angular displaceme...
Deriving the Energy-Momentum Relation The equation for calculating the?kinetic energy?Ek?of a particle?m?moving at velocity?v?is given by: The formula for the momentum?p?of the same particle is: Co...
Elastic & Inelastic Collisions In both collisions and explosions, momentum is?always?conserved However,?kinetic energy?might not always be A collision (or explosion) is either: Elastic?– if the...
Core Practical 10: Investigating Collisions using ICT Aims of the Experiment To investigate conservation of momentum in two directions Considering if collisions are elastic Constructing a diagram o...
Applying Conservation of Linear Momentum The principle of conservation of linear momentum states: The total momentum before a collision = the total momentum after a collision provided no external f...
