Formulas I have learned in my pre-AP physics class

1. Dec 7, 2004

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
$$F_F$$ = 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.

Last edited: Dec 7, 2004
2. Dec 7, 2004

Nylex

You mean gravitational constant.

3. Dec 7, 2004

dextercioby

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.

4. Dec 7, 2004

TriumphDog1

there i fixed it

5. Dec 7, 2004

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.

6. Dec 7, 2004

TriumphDog1

i did a quick google search and found this

7. Dec 8, 2004

TriumphDog1

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

8. Dec 8, 2004

prasanna

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

$$v_e$$ is the escape velocity

Last edited: Dec 8, 2004