Increasing & Decreasing Functions What are increasing and decreasing functions? How do I find where functions are increasing, decreasing or stationary? To identify the intervals on which a func...
Language of Proof What is proof? Proof is a series of logical steps which show whether a result is true or not for a set of specified numbers e.g. All intigers, all even numbers etc Notation...
Edexcel IGCSE Physics 复习笔记 1.4.1 Moments The Moment of a Force As well as causing objects to speed up, slow down, change direction and deform, forces can also cause objects to rotate An ...
Edexcel IGCSE Physics 复习笔记 1.3.4 Momentum & Safety Features Momentum & Safety Features Since force is equal to the rate of change in momentum, the force of an impact in a vehicle...
Edexcel IGCSE Physics 复习笔记 1.3.3 Newton's Third Law Newton's Third Law Newton's third law of motion states: Whenever two bodies interact, the forces they exert on each other are e...
Tilting What does it mean if a rod is on the point of tilting? A rod will tilt (rotate) about a pivot if the resultant moment about that pivot is non-zero Examples of tilting: A person walki...
Edexcel IGCSE Physics 复习笔记 1.3.2 Forces & Momentum Forces & Momentum When a force acts on an object that is moving, or able to move, the object will accelerate (or decelerate) Th...
Uniform Rods & Laminae What is meant by the centre of mass of an object? The centre of mass of an object is the point at which the weight of the object may be considered to act For a uni...
Using Moments - Equilibrium What happens with moments if a rigid body is in equilibrium? If a rigid body is in equilibrium then: The resultant force is 0 N The resultant moment about any poi...
