AQA A Level Physics复习笔记4.3.5 Drag Forces
Drag Forces Drag forces are forces that oppose the motion of an object moving through a fluid (gas or liquid) Examples of drag forces are?friction?and?air resistance Drags forces: Are always...
AQA A Level Physics复习笔记4.3.4 Projectile Motion
Projectile Motion The trajectory of an object undergoing projectile motion consists of a?vertical?component and a?horizontal?component These need to be evaluated separately Some key t...
AQA A Level Physics复习笔记4.3.3 SUVAT Equations
SUVAT Equations The SUVAT equations are the equations of motion used for objects in constant acceleration They contain the following variables: s??= displacement (m) u?= initial velocity (m ...
AQA A Level Physics复习笔记4.3.2 Motion Graphs
Motion Graphs Gradients The gradient of a?displacement-time graph is the?velocity The gradient of a?velocity-time graph is the?acceleration Area Under the Graph The area under a?velocity-time graph...
AQA A Level Physics复习笔记4.3.1 Motion Along a Straight Line
Displacement, Speed, Velocity & Acceleration Scalar quantities Scalar quantities only have a magnitude (size) Distance:?the total length between two points Speed:?the total distance trav...
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...
