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Physics Ch. 2 & 3 - Coggle Diagram
Physics Ch. 2 & 3
Chapter 2: Accelerated motion
is composed of
acceleration
its defintion
change in speed and/or direction
its components
length (m)
form its unit
m/(s^2) or m s^-2
time (s^2)
its equation
$$\text{Average Acceleration} = \frac{\text{Change in Velocity}}{\text{Time Taken}}$$
$$\mathbf{a}_{\text{avg}} = \frac{\Delta \mathbf{v}}{\Delta t} = \frac{\mathbf{v} - \mathbf{u}}{t}$$
a few variants
uniform acceleration
non-uniform acceleration
acceleration of free fall (g)
g on Earth = 9.81 m/s^2
deceleration
acceleration opposite (negative) of an intended motion
equations of motion (suvat)
which are
$$s = ut + \frac{1}{2}at^2$$
$$s = \frac{(u+v)}{2}t$$
$$v = u + at$$
$$v^2 = u^2 + 2as$$
where
s = Displacement
a = acceleration
but only this kind
v = Final velocity
t = time taken
u = initial velocity
projectile motion
has two components
which are
x-component (horizontal)
constant velocity
$$v_x = v\ cos\ \theta$$
equations based on
$$v = s/t$$
$$because\ v\ is...$$
1 more item...
related to chapter 1
where...
3 more items...
y-component (vertical)
accelerated motion
$$v_y= v\ sin\ \theta$$
$$these\ components\ form\ v$$
equations based on
Chapter 3: Dynamics: Explaining motion
is composed of
Force
its components
mass (kg)
time (s)
length (m)
from the unit
$$kg\ m/s^2\ or\ N$$
its variants
push and pull
An object being pushed or pulled, causing it to accelerate
weight
Force of gravity acting on the object
drag
Force opposite of the object's intended direction's motion when going through a fluid
friction
Force from two surfaces rubbing along on each other
tension
Force in a rope/string/spring when compressed/stretched
contact force
When objects A & B come into contact, force perpendicular to the surface of object A pushes object B that's touching it
upthrust
Force from pressure of a fluid (usually water) acting upwards on the bottom of the surface of an object
its equation
$$Force = Mass\ \times\ Acceleration$$
$$F = ma$$
Newton's three laws of motion
1st law
Inertia
An object will stay in uniform motion (or at rest) until acted on by a resultant force
the resistance to change velocity
for force, inertia is
Mass
2nd law
$$F = ma$$
Resultant force is proportional (or equal) to mass times acceleration
3rd law
Newton's 3rd law pair
When two objects interact, they both exert a force on each other that is equal in magnitude and opposite in direction
SI units
Base units
there are only 7, which are
Length
meter (m)
Mass
kilogram (kg)
Time
second (s)
Electric current
ampere (A)
Thermodynamic temperature
kelvin (K)
Amount of substance
mole (mol)
Luminous intensity
candela (cd)
Derived units
they are combinations of base units
example (relevant to this chapter)
Newton (N)
which basically is
$$N = kg\ m/s^2$$