Speed and acceleration:

where:

*v *is velocity

*x *is displacement (or distance)

*t *is time

*a* is acceleration

Uniformly accelerated motion:

where:

*v *is final velocity

*u *is initial velocity

*x *is displacement (or distance)

*t *is time

*a* is acceleration

Momentum and force:

where:

*p *is momentum

*m *is mass

*F *is force

*Δ *is change in

Circular motion:

where:

*ω *is angular velocity

*v *is velocity

*T *is period

*r *is radius

*F *is force

*m
*is mass

Work and energy:

where:

*g *is gravitational field strength (9.81 N/kg)

*W *is work

*PE *is potential energy

*KE *is kinetic energy

*m *is mass

*v
*is velocity

*h *is height

*Δ *is change in

*F
*is force

Power and efficiency:

where:

*P *is power

*Δ *is change in

*F *is force

*W *is work

*v * is velocity

*t *is time

Stress and strain:

where:

*A *is area

*e *is extension

*l *is length

*F *is force

Current electricity:

where:

*Q *is charge

*I *is current

*V *is voltage

*R
*is resistance

*Є* is the electro-motive
force (e.m.f)

Capacitors:

where:

*C *is capacitance

*d *is distance

*V *is voltage

*A *is area

*d
*is distance

*E *is energy

Radioactivity:

where:

*I *is intensity of radiation

*E *is energy

*m *is mass

*T1/2
*is half-life

*c *is light's speed (299 792 485 m/sec)

*λ* is wavelength

*N *is number of radioactive atoms

Simple harmonic motion:

where:

*T
*is period

*l *is length of pendulum's string

*x *is displacement moved by pendulum

*g *is gravitational field strength

*
ω *is angular velocity

*v *is velocity

*
a *is acceleration

*m *is mass

*k *is spring stifness

Waves:

where:

*f* is frequency

*s* is fringe separation

*λ* is wavelength

*D* is distance to screen

*w* is slit separation

*d* is grate spacing

*c *is velocity of wave

Refraction:

where:

*n *is refractive index

*c *is speed of light in a vacuum

*v *is speed of light in material

*θ1 *is angle of incidence

*θ2 *is angle of refraction

Photons and duality:

where:

*Ek
*is kinetic energy

*E *is energy

*f
*is frequency

*p *is momentum

*h *is Planck's constant

*Φ* is work function for metal

Magnetism:

where:

*Φ* is flux

*F *is force

*Q
*is charge

*v *is velocity

*μ *is the permeability
of free space (constant)

*n *is number of turns divided by length of coil

*B *is field flux density

*I *is current

*l *is length of wire

Induced Current:

where:

*N *is the number of turns of a coil

is the electro-motive force (e.m.f)

*L *is the self-inductance (constant)

A.c. and transformers:

where:

*N/I/Vp* is primary number of turns/current/voltage
of transformer

*N/I/Vs
*is secondary number of turns/current/voltage
of transformer

r.m.s.
is root mean square

*X *is reactance

*w *is angular frequency

*C *is capacitance

Gravitation:

where:

*g *is gravitational strength

*G *is universal constant of gravitation

*V *is gravitational potential

Thermodynamics:

where:

*c
*is specific heat capacity

*l *is specific latent heat

*Q *is amount of heat transferred

*T *is temperature

*U *is internal energy

*W *is work done by a system

*k *is Boltzman' constant

Gases:

where:

*p
*is pressure

*V *is volume

*N *is number of particles

*c *is average speed of particles

*n *is number of moles in a gas

*R *is universal molar gas constant

Electrostatics:

where:

*F* is
force

*Q *is charge

*r *is distance between 2 charged objects

*ε0 *is
permittivity of free space

*E *is energy

*V *is voltage

*d
*is distance moved by charge

Δ*PE* is
change in potential