A complete summary of edexcel a level physics material notes, handwritten by an A* physics student (2024), with definitions and diagrams. These notes are a combination of my teachers, physics and maths tutors and further reading to form a complete set of thorough notes.
-tension causes tensilestrengthTo t
units fractional/decimal /%
↑ has no
-
expressed as
= Extension
<
~
E Strain
Stress (Pa) m
young
modulus -
describes stiffness of
materialYM =
elastic deformation -
material returns to original shape once applied force is removed
Hooke's Law the extension object is directly proportional to the applied force
-
of an
Fa >
k
-
xF =
Spring (Nm')
I
constant
↑ or Fel = kx2
-
>
clastic strain energy
(worm donel AEe = FA
/m
plastic deformation material's shape is deformed permanently
Fr >
- loading
unloading some work done in
stretching spring will not be
recovered it will dissipate as thermal which
,
energy
will dissipate
m
limit of proportionality(P) -
point after which Hooke's law is no
longer obeyed
elastic limit (f)-just after P and if you increase the force applied beyond it the
material will deform plastically
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