Today's Bad Stories !

[nomemory]

Fire alarm went off here in the dorm today. It took four hours until someone finally came and turned it off. Every room as well as the corridor has an alarm and they were all making a hell of a noise. The only place that was bearable was the kitchen, where the alarm started in the first place since someone had burned their food. And of those that was here no-one knew who to call. After calling to basically everyone who remotely had something to do with the dorm I finally managed to find someone who had a clue. But he didn't know much either. But after he had called around for an hour or so, he called back and said people would be on their way. Two hours later people came and turned the damn thing off. Seriously bad system. We should have been given info about what to do in cases like this, and there should be info posted somewhere.

[sonoci]

Did a test today...a lot of which I had NO idea what I was doing D:


I think I at least passed, but I did badly, I know that much :I

[KaitoGirl]

I'M DEAD! Tomorrow I have a Physics test and I don't know A THING ABOUT IT!

[Akonyl]

I'M DEAD! Tomorrow I have a Physics test and I don't know A THING ABOUT IT!

d=d₀ + vt + .5at², all you need to know! :V

[dilbertschalter]

I'M DEAD! Tomorrow I have a Physics test and I don't know A THING ABOUT IT!

d=d₀ + vt + .5at², all you need to know! :V

physics as i remember it (both in 10th grade and in AP) was basically rearranging 3-4 equations with algebra, so i would agree with that statement (i don't remember anything specific now though).

[ranger]

I'M DEAD! Tomorrow I have a Physics test and I don't know A THING ABOUT IT!

d=d₀ + vt + .5at², all you need to know! :V

physics as i remember it (both in 10th grade and in AP) was basically rearranging 3-4 equations with algebra, so i would agree with that statement (i don't remember anything specific now though).

That just covers a part of HS Physics akonyl and dilbert, what is she going to do when she's given questions on Work or Energy? 

From what I recall, HS Physics covers 1-D/2-D Kinematics (which is what you guys are referring to), Circular Motion, Newtonian Laws, Energy/Work problems, Collisions, Center of Mass, Rotation (torque and angular momentum), Waves/Harmonic motion, and some minor E and M with some basic circuit analysis.

So if you don't remember a lot, uh oh lol

[sonoci]

All of the above is why I got out of my Physics exam. That class just bored me @_@

...I even got a worse mark in it than gym...and I am the least athletic person imaginable, so that's saying something OTL

[ranger]

All of the above is why I got out of my Physics exam. That class just bored me @_@

...I even got a worse mark in it than gym...and I am the least athletic person imaginable, so that's saying something OTL

PE in High school if I remember was an easy A, just show up, and at least give effort - you didn't have to be athletic.

You got out of your physics exam? I don't understand what you mean.

Anyways, here's my bad story - i have to do 2 labs, a hw assignment, read a chapter, and do an online quiz...like, tonight.  FUUUUU

[sonoci]

In my school, there're things called 'recommends' and 'exemptions'. Recommends are given if you've got 85% or higher in a class for the year and have not demerits or detentions or penalties or lates. The same goes for Exemptions except the mark is lower, like 70% or something.

There're only given out though if you're writing a minimum of 3 tests, and even then you can only get one of each so if you have 6 tests, you still have to write 4.

I wrote Biology, French, History and (technically sorta) Drama. I got out of Physics. Drama's 'test' was the performances itself, so yeah.

[Mr. E]

Really basic rules of physics:
1) Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
2) The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.
3) For every action there is an equal and opposite reaction.

Yeah, they're really basic stuff but remembering them might help you out when you're blanking on what to do, ya never know  ;)

I don't know if you need equations but I'll list some anyways

Kinematics
Simple ones:
v=Δx/t units usually in m/s
acceleration is just a derivative of velocity, a=Δv/t; m/s²

vf=vi + at (f for final, i for initial)
vf²=vi²+2aΔx
Δx=vit+½at²

Forces
g=9.8m/s²
ΣF=ma (sum of forces=mass*acceleration)
w=mg (weight=mass*acceleration due to gravity)
Ff=µN (Force of friction=coefficient of friction*normal force)
Normal force is a supportive force, so it may be mg, mgcosΦ, or something else. You have to figure that part out on your own .

Work/Energy/Power/Momentum
Energy is always conserved, and momentum is conserved as long as there are no outside forces like friction.
There are two types of collisions, elastic and inelastic, kinetic energy is only conserved in the former. Inelastic collisions are ones where the objects stick together, btw  :P.

W=FΔx (work=force*displacement) units;joules
P=W/t (power=work over time) units;watts
K=½mv² (kinetic energy= 0.5*mass*velocity[squared])
U=mgh (potential energy=mass*acceleration due to gravity*height)

If something has either potential energy or kinetic energy, you can set the equations equal to each other like:
K=U
½mv²=mgh (mass is cancelled, so that means you don't need to know mass to solve these problems)

The K= equation and the U= equation both result in units of newtons

W=ΔK (while this equation is work=change in kinetic energy, it is not newtons but is instead joules, the unit for work)
p=mv (momentum=mass*velocity)

Springs
I don't remember much about Springs but you should know Hooke's Law and how potential energy is stored in a spring. That should probably be enough.

Electricity

Some constants:
e=elementary charge (+/- 1.6*10^-19 C)
k=Coulomb's constant (8.99x10^9 N*m²/C²)

Equations:
E=F/q (Electrical Field=Force over charge)
E=kq/R²(Electrical Field=coulomb's constant*charge all over radius[squared])
V=W/q (Potential Difference[commonly known as voltage]=Work over charge)
E=V/d (Electrical Field=Voltage over distance)
I=Q/t (Current=Charge over time)
V=IR (Voltage=Current*Resistance)
P=W/t (Power=Work over time)
P=IV (Power=Current*Voltage)

Circuits
Units for Current is A(as in amperes, amps for short)
Units for Voltage is V(...voltage lol)
Units for Resistance is Ω(ohms)
There are 2 types of circuits, series and parallel:

Series:
In a series, current(I) is always constant, the total voltage[V] is the sum of all voltages, and the total resistance[R] is the sum of all resistances.

Parallel:
In a parallel, current(I) is the sum of the branches, and the voltage[V] is constant. Resistance is a bit more tricky. To find the total resistance in a parallel, you take the inverse of all the resistances and add them up. The inverse of THAT answer is the total resistance.
Example: A parallel circuit with 4 separate resistors having 10Ω, 10Ω, 20Ω, and 20Ω. You would do (1/10)+(1/10)+(1/20)+(1/20)=
0.3, and do (1/.3)=3.333(repeating) total Ω of resistance.

If you need to know anymore things, just ask. I just finished physics, and I'm taking AP physics this next school year.

[Commi-Ninja]

Concerning Physics:  apparently it's much easier with Calculus.  In fact, apparently it's completely unintelligible for some people using Trigonometry if all they've ever used was Calculus.

Unfortunately for me, I'm learning the hard way.  When in doubt, google! (Which is, of course, impossible on tests. >.>)

[ranger]

Concerning Physics:  apparently it's much easier with Calculus.  In fact, apparently it's completely unintelligible for some people using Trigonometry if all they've ever used was Calculus.

Unfortunately for me, I'm learning the hard way.  When in doubt, google! (Which is, of course, impossible on tests. >.>)

I guess knowing Calculus helps regarding big picture stuff - but it really isn't needed.  Anything that you need Calculus for Physics for will be retaught again, and you will just be given the gist of it - pretty much meaning they'll just tell you the formula/how to do it, rather than intensively going into depth of the subject like a math class would.

[bluekaitou1412]

My wrist feels like it got smashed by something. Really hurts a lot.

[Commi-Ninja]

ranger:  the Physics course(s) I am taking do not require Calculus.  I've just been told that it's about a billion times easier with Calculus (and the person that told me that doesn't understand how Physics is possible without Calculus).

[MistyDelusions]

I had to wear heels the whole day because of work (internship). I only have to wear them three times a week but my feet always end up being sore at the end up the day. I can't bring slippers to the office because it would really seem inappropriate to wear during working hours.