AQA A Level Physics复习笔记4.2.3 Centre of Mass
Centre of Mass The centre of mass of an object is the point at which the weight of the object may be considered to act The position of the centre of mass of uniform regular solid is at its c...
AQA A Level Physics复习笔记4.2.2 Couples
Couples A couple is a pair of equal and opposite coplanar forces that acts to produce rotation only A couple consists of a pair of forces that are: Equal in magnitude Opposite in direction P...
AQA A Level Physics复习笔记4.2.1 Moments
What is a Moment? A moment is the turning effect of a force Moments occur when forces cause objects to rotate about some pivot The moment of a force is given by Moment (N m) = Force (N) × pe...
AQA A Level Physics复习笔记4.1.2 Resolving Vectors
Resolving Vectors Two vectors can be represented by a single resultant vector Resolving a vector is the opposite of adding vectors A single resultant vector can be resolved This means...
AQA A Level Physics复习笔记4.1.1 Scalars & Vectors
Scalars & Vectors A scalar is a quantity which only has a magnitude (size) A vector is a quantity which has both a magnitude and a direction For example, if a person goes on a hike in th...
AQA A Level Physics复习笔记3.5.1 Refraction at a Plane Surface
Refractive Index Refraction occurs when light passes a boundary between two different transparent media At the boundary, the rays of light undergo a change in direction The direction is take...
AQA A Level Physics复习笔记3.4.1 Single Slit Diffraction
Diffraction Diffraction is the spreading out of waves when they pass an obstruction This obstruction is typically a narrow slit known as an aperture The extent of diffraction depends ...
AQA A Level Physics复习笔记3.3.1 Path Difference & Coherence
Path Difference & Coherence Interference occurs when waves overlap and their resultant displacement is the sum of the displacement of each wave This result is based on the principle of s...
AQA A Level Physics复习笔记3.2.1 Stationary Waves
Stationary Waves Standing waves are produced by the superposition of two waves of the same frequency and amplitude travelling in opposite directions This is usually achieved by a travelling ...
