AS Level Physics Revision Notes

Okay, I've finally managed to finish these notes for you people (and for myself of course :p) so I've thrown them up to assist anyone who's got an exam in um... less than a week :O

I hope that they help and such and it covers topics such as Units, Symbols, Density, Waves, Optics and much more!

Kathryn.C

HideShow resource information
  • Created by: Kathryn.C
  • Created on: 03-01-11 20:32
Word Document 43.37 Kb

Pages in this set

Page 1

Preview of page 1
ASLEVEL
PHYSICS
Revision Notes

CONTENTS
UNITS, SYMBOLS AND NUMBERS 2
MOTION 3
DYNAMICS 4
WORK AND ENERGY 5
VECTORS, MOMENTS AND PROJECTILES 6
WAVES 7 9
OPTICS 10
MATERIALS 11



















Page | 1

Page 2

Preview of page 2
UNITS, SYMBOLS AND NUMBERS

5 BASE UNITS:
Base Quantity Base Unit Base Symbol
Length Metre m
Mass Kilogram kg
Time Seconds s
Current Ampere A
Temperature Kelvin K (100°C + 273 = K)

Area = length x width m2 Average speed = distance/time m s1
Volume = length x width…

Page 3

Preview of page 3
MOTION

SPEED:
Definition: CHANGE IN DISTANCE PER UNIT TIME
Average speed = distance/time
Measured in: m s1
SCALAR QUANTITY ­ has size but not direction

DISPLACEMENT:
Definition: DISTANCE MEASURED IN A STRAIGHT LINE FROM A SPECIFIC POINT
Symbol: `s'
VECTOR QUANTITY ­ has both size and direction

VELOCITY:
Definition: CHANGE…

Page 4

Preview of page 4
DYNAMICS

FOUR FORCES IN NATURE:
Forces Detail
STRONG NUCLEAR FORCE Hold Protons and Neutrons together in the nucleus
WEAK NUCLEAR FORCE Involved in radioactive decay C14
ELECTROMAGNETIC FORCE Responsible for attractive and repulsive forces
between atoms e.g. air resistance, friction
GRAVITATIONAL FORCE Gravity is the dominant force in the universe…

Page 5

Preview of page 5
In physics, mechanical work is done when a force moves
Work equation: W = Fs
Effect a force has in a particular direction is called a COMPONENT
Require a COMPONENT TRIANGLE to calculate a component
COMPONENT TRIANGLE: a rightangled triangle in which the force (F) forms the hypotenuse
W =…

Page 6

Preview of page 6
VECTORS, MOMENTS AND PROJECTILES

VECTORS:
Definition: A QUANTITY WHICH HAS DIRECTION AS WELL AS SIZE

Components of a Vector Calculation: Fx = Fcos° horizontal component
Fy = Fsin° vertical component
Vector Diagram: tail of one arrow starts at the head of the previous arrow

CENTRE OF MASS OF A BODY:…

Page 7

Preview of page 7
WAVES

WAVES:
Definition: A WAVE IS A DISTURBANCE WHICH CAN TRAVEL, USUSALLY TRANSFERRING
ENERGY
Wave Speed: DISTANCE TRAVELLED BY A WAVE FRONT PER UNIT TIME
Continuous wave: IN A FULL CYCLE OF VIBRATION, ONE POINT IN THE MEDIUM MOVES FROM
ITS EQUILIBRIUM POSITION TO ONE EXTREME TO THE OTHER EXTREME…

Page 8

Preview of page 8
Trough + Crest = cancelled (straight line) destructive interference

COHERENT SOURCES:
Definition: COHERENT SOURCES OF WAVES ARE SOURCES WHICH ARE POSITIONED SIDE BY
SIDE, HAVE THE SAME FREQUENCY AND ARE VIBRATING IN PHASE
Need to determine the number of wavelengths from one wave source to a particular point
Determine the…

Page 9

Preview of page 9
OPTICS

LAW OF REFLECTION:
Angle of incidence = angle of reflection
Angles of incidence and reflection are measured between the ray and the normal

REFRACTION:
Definition: THE BENDING OF WAVES DUE TO A CHANGE IN SPEED
When a beam of light travels from a less dense to a denser material,…

Page 10

Preview of page 10
MATERIALS

DENSITY:
Definition: DENSITY IS MASS PER UNIT VOLUME
Most commonly used units for density are g cm3 and kg m3

HOOKE'S LAW:
For a material which obeys Hooke's law the extension is DIRECTLY PROPORTIONAL to the stretching force
PROVIDED the limit of the proportionality has not been exceeded.
A…

Comments

Nematode

Report

How did your exams go? I understand it's been about 6 years since you posted this, but I'm curious!

Similar Physics resources:

See all Physics resources »