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Physics Formula sheet
I. UNIT PREFIXES
Giga (G) 1 billion or 10^{9}
Mega (M) 1 million or 10^{6}
kilo (k) 1 thousand or 10^{3}
centi (c)  1 hundreth or 10^{2}
milli (m)  1 thousandth or 10^{3}
micro (μ)  1 millionth or 10^{6}
nano (n)  1 billionth or 10^{9}
II. EQUATIONS FOR PHYSICS EXAM
Always
For constant acceleration
Acceleration from free fall
III. DYNAMICS
Newton's Second Law
Force of kinetic friction
where N is the normal force.
Force of static friction
where N is the normal force.
Centripetal acceleration, points inward (along radius
of circle )
where v is speed of particle and r is radius of the circular
arc traveled by the particle. Centripetal Force = mass x
centripetal acceleration.
Newton's Law of Gravitation
where , the M's are the
masses of the two bodies and R is the distance between
their centers.
For a constant force, work is given by
where F is the constant force, d is the displacement and
θ is the angle between the F and d vectors.
Work Energy Principle
where KE = Kinetic Energy = (1/2)mv^2
Force from spring
where x is the displacement from equilibrium and k is the
spring constant.
Potential energies for conservative forces
Work by a conservative force
If only conservative forces,
Momentum
Newton's second Law in terms of momentum
For elastic head on collisions
For constant angular acceleration
Relation to linear motion
Torque
Moment of Inertia
Rotational Kinetic energy
Angular momentum
Newton's second law
Conditions for equilibrium
Density
Pressure
Pressure at depth h in fluid
Atmospheric Pressure Pascal
Equation of continuity
Bernoulli Equation
Frequency and Period
Period of spring
Period of Pendulum
Wave velocity
Sound Intensity
where
Doppler Effect
IV. ELECTRIC FORCE AND FIELDS
Force between two point charges q_{1} and q_{2}
where direction is given by repulsion or attraction of
the charges. I am fine if you use the approximation of
Electric field of a point charge q
Electric fields relation to Electric force
Electric Potential at any point in space defined as electric potential energy per unit charge
Inside a uniform electric field, the change in potential is given by
where E is the electric field and d is the distance traveled in the uniform
field.
For a point charge
Capacitance
For Parallel Plates
Where is given by the relation
In the presence of a dielectric with a dielectric constant
,
the value of
is replaced by
Energy stored in a capacitor
Ohm's Law
V is potential difference in Volts , I is current in Amps,
and R is resistance in Ohms which is denoted by Ω.
For a material,
where
is the resistivity and L is the length of wire
and A is the cross sectional area.
Temperature dependence
Power
AC Current
Power in AC circuit
Addiding resistors in series
Adding resistors in parallel
Kircho ' s rules
1. Current into a junction = current out of a junction.
2. Total change in potential around closed loop = 0
SI Units for magnetic field Tesla , also sometimes see
Gauss where 10^{4} Gauss = 1 Tesla
Force on electric current in a magnetic field
Force on moving charge in a magnetic field,
Magnetic field from a long straight wire
Induced electromotive force
Transformer equation
velocity of light = c
Law of Reflection:
Snell's Law or Law of Refraction
For mirrors and thin lenses:
Magnification
focal length for mirror
Interference:
Light interference gives a maxima when the waves have a
total difference of an integer number of wavelength . It is
a minimum when the waves have a halfinteger difference.
Wavelength in medium:
where is the
wavelength in a vacuum.
Double Slit:
Path difference = d sinθ where d is the separation of
the slits and theta is the angle to the screen position
measured from between the slits.
For constructive
For destructive
Single slit:
Diffraction minima are located at d where n
is an integer.
Reflection on thin films, if the light bounces o of a
higher n material, a phase change of 1/2 λ occurs.
Magnifying glass
for relaxed eye, N=near point of the eye, for adults
approx 25 cm.
for eye focused at the near point
Telescope
Microscope
is approximately
V. ALGEBRA AND TRIGONOMETRY
is solved by
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