###
Force of Friction

µN

###
Acceleration of a Circle

v²/r

###
Force of a Spring

-kx

###
Potential Energy of a Spring

½kx²

###
Period of a Spring

2π√(m/k)

###
Period of a Pendulum

2π√(l/g)

###
Force Of Gravity (Universal)

-Gm₁m₂/r²

###
Potential Energy due to Universal Gravity

-Gm₁m₂/r

###
Force of Buoyancy

ρVg

###
P+ρgy+½ρv²

constant (P₁+ρgy₁+½ρv₁²=P₂+ρgy₂+½ρv₂²)

###
average Kinetic energy

3/2k(sub b)T

###
average speed

√(3RT/M)= √(3k(sub b)T-µ)

###
efficiency of carnot

Th-Tc/Th

###
1/s (sub i)+1/s₀

1/f

###
M

h(sub i)/h₀=s(sub i)/s₀

###
potential energy of electric field

kq₁q₂/r= qV

###
V

k(q₁/r₁+q₂/r₂+...)

###
potential energy of a capacitor

½QV=½CV²

###
P (brightness as well as power)

IV

###
Cparallel

C₁+C₂+...

###
1/Cseries

1/C₁+1/C₂+...

###
1/Rparallel

1/R₁+1/R₂+...

###
Force of Magnetism

qvBsinθ

###
Force of Magnetism

BIlsinθ

###
magnetic flux (Φm)

BAcosθ

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