Anyone good at basic physics?
- Thread starter Platypus
- Start date
Anubis
No Lifer
In the time that it took you to post this post, someone would've already answered your question if you had posted it in our original post. (<---- How's that physics for you 
Post it now and you'll get an answer in no time.
Post it now and you'll get an answer in no time.
Originally posted by: thirtythree
I know nothing
edit: but do you know how to install car speakers?
No but I know the wave equation which describes the sounds those speakers produce , And without which those speaker would not exist.
PM me if you need help with the PHYS , my wife is taking phys in the summer time as well. So I am pulling duty as a tutor at my house. She is chem major. So I like that she needs help with phys. Cause I suck a chemistry.
What do you get when you combine phys and chem. Physical Chemistry the damn hardest class there is.
DrPizza
Administrator Elite Member Goat Whisperer
<----- math and physics teacher...
I love mechanics.. my favorite thing to teach, even more than calculus.
The bummer, though, is that I'm at school right now where I don't have AIM, or any other messaging programs. Only ATOT. And, I forbid my kids from putting AIM on the computer at home.
Too bad you didn't post your questions in here... I'd have been willing to spend 5 or 10 minutes typing after I saw them.
Eigen, I remember P Chem was a major PITA only due to the amount of memorization of formulas. I suck at memorizing... that made it hard.
btw, your physics course, are you learning mechanics via formulas (F=ma)
or are you taking it the calculus route?
If the formula route, may I suggest using VVVDAT tables to help you understand and solve problems?
edit: v v v d a t tables... looks horrible the way it showed up.
Vi Vf Avg V Displacement Acceleration Time
For a lot of problems, you can solve them using this table, rather than "el grande" s = vit+1/2at^2
It's a little more intuitive than using that formula.
For example: A spaceship is located 500 meters to the left of a space station, travelling to the left at 50 m/s. It is accelerating at 10m/s/s to the right. Where is it 20 seconds later?
edit2: acceleration is the rate the velocity is changing, it seems this is the part you're having trouble understanding? I do not write m/s^2 for quite a while in class... it's always meters per second each second. or, m/s/s. So, an acceleration of 10 meters per second each second means the velocity is increasing by 10 meters per second.... every second. But, to make it concise, 10 meters per second each second is written symbolically as 10m/s^2.
(just wait til you get to kilograms meters squared per second cubed!) :Q
t=20 put it on the table
decide which way is positive, which way is negative. May as well use the space station as 0, since it would make more sense to later say "it's 10 meters to the right of the space station" rather than "it's floating in space 490 meters from where it used to be.
left is negative, right is positive.
initial velocity is -50m/s put it on the table
acceleration = +10 put it on the table.
Think... 20*10 = 200, the velocity increases by 200 m/s. -50 + 200 = 150. Final velocity is +150m/s
Hmmmm... find the average of -50 and 150. Average velocity is 100/2 = +50m/s
put it on the table.
Hmmmm... average velocity is +50m/s for 20 seconds... that's 1000 meters.
positive, so it moved to the right.
Hmmm.... it was 500 to the left, moved 1000 toward the right, so it must be 500 meters from the space station on the right side.
Screw the formulas! (in a sense) p.s. my students will chant "-50 what? Jellybeans?" if I left the units off the -50 and the other unitless numbers above. I'm just too lazy when typing to include the units every time.
I wish you could have been more specific as to what your problem is.... But, I'm hungry, missed lunch and breakfast, and now need to get some food, hence home where there's no AIM.
I love mechanics.. my favorite thing to teach, even more than calculus.
The bummer, though, is that I'm at school right now where I don't have AIM, or any other messaging programs. Only ATOT. And, I forbid my kids from putting AIM on the computer at home.
Too bad you didn't post your questions in here... I'd have been willing to spend 5 or 10 minutes typing after I saw them.
Eigen, I remember P Chem was a major PITA only due to the amount of memorization of formulas. I suck at memorizing... that made it hard.
btw, your physics course, are you learning mechanics via formulas (F=ma)
or are you taking it the calculus route?
If the formula route, may I suggest using VVVDAT tables to help you understand and solve problems?
edit: v v v d a t tables... looks horrible the way it showed up.
Vi Vf Avg V Displacement Acceleration Time
For a lot of problems, you can solve them using this table, rather than "el grande" s = vit+1/2at^2
It's a little more intuitive than using that formula.
For example: A spaceship is located 500 meters to the left of a space station, travelling to the left at 50 m/s. It is accelerating at 10m/s/s to the right. Where is it 20 seconds later?
edit2: acceleration is the rate the velocity is changing, it seems this is the part you're having trouble understanding? I do not write m/s^2 for quite a while in class... it's always meters per second each second. or, m/s/s. So, an acceleration of 10 meters per second each second means the velocity is increasing by 10 meters per second.... every second. But, to make it concise, 10 meters per second each second is written symbolically as 10m/s^2.
(just wait til you get to kilograms meters squared per second cubed!) :Q
t=20 put it on the table
decide which way is positive, which way is negative. May as well use the space station as 0, since it would make more sense to later say "it's 10 meters to the right of the space station" rather than "it's floating in space 490 meters from where it used to be.
left is negative, right is positive.
initial velocity is -50m/s put it on the table
acceleration = +10 put it on the table.
Think... 20*10 = 200, the velocity increases by 200 m/s. -50 + 200 = 150. Final velocity is +150m/s
Hmmmm... find the average of -50 and 150. Average velocity is 100/2 = +50m/s
put it on the table.
Hmmmm... average velocity is +50m/s for 20 seconds... that's 1000 meters.
positive, so it moved to the right.
Hmmm.... it was 500 to the left, moved 1000 toward the right, so it must be 500 meters from the space station on the right side.
Screw the formulas! (in a sense) p.s. my students will chant "-50 what? Jellybeans?" if I left the units off the -50 and the other unitless numbers above. I'm just too lazy when typing to include the units every time.
I wish you could have been more specific as to what your problem is.... But, I'm hungry, missed lunch and breakfast, and now need to get some food, hence home where there's no AIM.
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