AQA A Level Maths: Mechanics复习笔记4.1.4 Tilting
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...
AQA A Level Maths: Mechanics复习笔记4.1.3 Centres of Mass
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...
AQA A Level Maths: Mechanics复习笔记4.1.2 Using Moments - Equilibrium
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...
AQA A Level Maths: Mechanics复习笔记4.1.1 Moments Diagrams
Moments Diagrams When an object is modelled as a particle we do not need to consider the rotation of the object due to forces. When we model an object as a rigid body then we need to consid...
AQA A Level Maths: Mechanics复习笔记3.3.5 Coefficient of Friction - Harder Problems
Coefficient of Friction - Equilibrium How is friction used when a body is in equilibrium? When a body is in static equilibrium under the action of a number of forces, including friction, the...
AQA A Level Maths: Mechanics复习笔记3.3.4 Coefficient of Friction - Inclined Planes
Coefficient of Friction - Inclined Planes How is the coefficient of friction used in problems involving inclined planes? On an inclined plane the basic principles are the same as for coeffic...
AQA A Level Maths: Mechanics复习笔记3.3.3 Coefficient of Friction - F = ma
Coefficient of Friction - F = ma How do we apply Newton’s Second Law (F = ma) in problems involving friction? The coefficient of friction combined with F = ma allows you to determine an obje...
AQA A Level Maths: Mechanics复习笔记3.3.2 Coefficient of Friction
Coefficient of Friction What is friction? Friction is a force between a surface and an object that acts to resist motion of the object across the surface On a horizontal surface with no forc...
AQA A Level Maths: Mechanics复习笔记3.3.1 Resolving Forces & Inclined Planes
Resolving Forces If a single force is applied at an angle to the direction of motion it will need to be resolved into components of the force that act perpendicular to each other. Why resol...
