Formulas

[TriumphDog1]

Here are all the formulas I have learned in my pre-AP physics class so far, I just finished the 1st semester:
They are in no particular order.

F_c = \frac {mv^2}{r}

a_c = \frac {v^2}{r}

F_F = \mu * F_N

C = 2 * \pi * r

V_f = V_i + at

V_f^2 = V_i^2 + 2ad

d = V_i * t + \frac {1}{2} * at^2

d = \frac {1}{2} (V_f + V_i) * t

v = \frac {d}{t}

F = ma

F = \frac {G * m_1 * m_2}{r^2}

g = \mu * a

g = \frac {Gm}{r^2}

v_o = \sqrt {\frac {Gm}{r}}

P.E. = mgh

W = Fd

K.E. = \frac {1}{2} * mv^2

KEY
F_c = centripital force
a_c = centripital acceleration
m = mass
v = velocity
r = radius
F_F = frictional force
F_N = normal force(weight)
\mu = coefficient of friction
C = circumference
V_f = final velocity
V_i = initial velocity
a = acceleration
d = distance
g = acceleration due to gravity
t = time
G = gravitational constant
P.E. = potential energy
K.E. = kinetic energy
W = work

some important values:
mass of the earth = 5.98 * 10^24 kg
radius of the earth = 6.38 * 10^6 km
radius of the moon = 1.74 * 10^3 km
mass of the moon = 7.35 * 10^35 kg
gravitational constant = 6.67 * 10^-11 \frac {N*m^2}{kg^2}

Feel free to add anything or make suggestions. I will add more as the year goes on. I hope this helps some of you.

[Nylex]

force of gravity = 6.67 * 10^-11 \frac {N*m^2}{kg^2}

You mean gravitational constant.

[dextercioby]

You mean gravitational constant.

The gravitational constant a.k.a. Cavendish's constant IS THE GRAVITATIONAL FORCE WITH WHICH 2 BODIES OF 1Kg EACH SITUATED AT A DISTANCE OF OF 1m ATTRACT EACH OTHER.

That's how those words got there instead of "gravitational/Cavendish's constant".Via a simple dictionary-type definition.Unfortunately,it weren't all,just the first 2 which would lead to an erroneous statement.

Congratulations,Nylex!!Apparently statistical mechanics and Cavendish's constant have nothing in common,or do they...??I'll let u think about it.

PS Sorry for being cynical.

[TriumphDog1]

there i fixed it

[Skomatth]

This could be helpful as a sticky, I see so many people stuck just because they don't know a formula (especially basic kinematic ones !). If it's online, a link to the AP B and C formula sheets would be helpful too, as it is basically what Triumph posted.

[TriumphDog1]

i did a quick google search and found this (http://www.collegeboard.com/prod_downloads/ap/students/physics/info_equation_tables_2002.pdf)

[TriumphDog1]

if this doesnt get stickied, nobody's even gonna see it with many new threads being created every day

[prasanna]

v_e = \sqrt{\frac{2GM}{R}}

v_e is the escape velocity