IBPH Ep. 1 Physical Quantities - Scalars and Vectors

[thefearofthelordj]

thx 4 responding me....but now let me ask in this way about speed .if a body has a speed 0f 2m/s @ an instant t=1 and 5m/s @ an instant t=2,does this means that the body has a total speed of 7m/s ? thx

[ibphysicshelp]

@thefearofthelordj No. When you have two numbers you can always add them, but it doesn't mean that the answer means anything useful.

Let's say that you have a car travelling at 2 m/s for 10s and then at 3 m/s for 15s. What is its average speed over these 15s? Distance covered in the first 10s: 2 x 10 = 20 m. Distance covered in the following 15s: 3 x 15 = 45 m.

Average speed is (total distance)/(total time) = (20 + 45)/25 = 2.6 m/s.

I hope this helps.

[thefearofthelordj]

is the speed a scalar quantity ? if so does 2m/s of x body + 3m/s of y body = to 5m/s ? thx...i expect to hear from thee!

[ibphysicshelp]

@thefearofthelordj speed is indeed a scalar quantity. As far as the second part is concerned, the answer is "it depends".

If 2 m/s is the speed of x, 3 m/s is the speed of y, what does 5 m/s represents? the speed of what? If you mean the total distance covered by these two (x and y) in a second then, yes, it is 5 m.

[Michael326]

It is comforting to know that I will be at least semi-competent in Physics before the first day of school. All kidding aside, thank you so much for posting these videos. It has made Physics a more bearable subject to study. I'm not a great math student, but this series clears up a lot.

[PersianArmin]

Thank you so much! You're the best!

[walkingonthemoon2]

ur making ur OSC lessons really useless.... u better stop this...

just kidding.. amaaazing.

[Sitara04]

thanx!!

[CHEESEMONKEY92]

you sir, are a genius...i however, am not

that is probbly why i am watching this =)

so, so helpful, i think these videos follow my AS course so

5*

and subbed

thankyou!

[Ayazkhaskheli]

this was very helpful for us.thnx

[purplepirate1109]

i can tell this episode is the first of many that i will watch, this is very helpful for me!

[complimentsheck]

I need 4 advanced courses for honours with distinction and my fourth one is gonna have to be IB. im already signed up for academic chemistry and physics so im just gonna up one of those to ib. Which is easier though, ib physics or ib chemistry

[ibphysicshelp]

I don't teach IB Chemistry so I cannot help you here. Sorry. Anyone else?

[altfreak2]

You should think about what your school is best at teaching, and what your strengths are in. I was cursed with a terrible ib hl physics teacher, but had an excellent ib hl chemistry teacher, so right now as i'm preparing for my final ib exams, i'm having much more trouble with physics than i am with chemistry.

[Ihatenicknames1]

I actually find IB chemistry much easier,

my entire class is struggeling most with physics, we are IB2, IB3 on the other hand, have another physics teacher and do best in physics. I really think that to some extent it is important what the teacher is like.

[altfreak2]

I think that if i had a good teacher in physics, it would've been my best subject, because i'm good with mathematics. Personally, I think that physics is the simpler subject, as it really only requires good math skills and an understanding of content in order for you to excel in it, but if your good at memorizing mechanisms, then go with chem. Hope this helped :)

[plazmatyk]

physics. definitely. chem is much harder

[lonogugeadult]

im pretty sure ib physics is easier i will take both next year in ib too

[00Avenger17]

@complimentsheck i would say chem is easier ;P but probs no help now lol if you like maths chose physics if you dont chose chem - simple. 

[djgiohappy]

Thanks so much....I am currently struggling with physics, and I think your videos are awesome.....

thanks man...

[purplepick1]

Thank You!

[duniya7]

Thanx a million for the effort! its very useful, could u kindly send some videos on astrophysics?

[TorBarstad]

very great innitiative! keep up the good work! :)

[AbandonedProductions]

thanks...what your doing will definately help a lot of students as it did with me!

[clumfuproductions]

"Please write me"

That's quite silly isn't it?

[sunanafan]

PLEASE CONTINUE!!!

:):)

your videos are so uselful!!

[broholm88]

Why was this discontinued?!?!?! What an awesome concept!

[ibphysicshelp]

It hasn't been discontinued. My teaching and other commitments have not allowed me to produce more podcasts. Right now, I'm working on the next episode. Going online in a week or two. And thanks for your comments. I'm glad you like the idea.

[broholm88]

Hey, thanks for the quick response!

Unfortunately (as you may know) the IB Physics May 2008 exams are already this tuesday-wednesday, so i'll have to revise the rest using conventional methods :)

[Haziqevo]

thanks for the video it helps me revise!

[me302]

this guy just as cool as the guy that showed us how to (or help to clear up how to) do calculus awesome keep it up and thanks!!

[carpitty]

man!!! this guy is awsome!!! i understood vectors properly!!! ty pop!!!

[luichy88]

Good video professor lol...

From Luis Gonzalez...

[Bathorn92150]

i love this guy

(hi annemarie) *waves*

did i ever tell you he invented POP corn?

[Bathorn92150]

awesome!!!