Physics Lesson: Projectile Motion Part 1 for High School

[iDJMIXTRESS]

woah. i am a bit confused. I wasn't told of the formula v=d/t

i was given formulas like Vx^2 = Ux^2

and Vy^2= Uy2 + 2ay(delta)y

Am i confusing things :s

[WhyIsMyNameSoLong1]

thanks man your soo goin to heaven cz of saving people's lives

[OokamiKyoodai]

I've got just one question: at 4:10 you say "you probably know: d_v= V_1*t + a*1/2*t^2". Where does that equation comes from?

[someone20ify]

great teacher...my physics teacher is also great but i m just refershing!!!! thanx for helping, sir!!!

[ruthxcore10]

oh i thought -9.80m/s^2 is the gravity not the acceleration

[andismokedatguitar]

@ruthxcore10 That's the acceleration OF gravity =)

[ruthxcore10]

@andismokedatguitar oh thanks.. I'm kind of confused there! =)

[greenran5]

370*

[greenran5]

@royourboat23 bullets travel even faster. Up to about 470 m/s!

[SkateKanata]

wow, setting the two components into two separate columns makes it so much easier to solve.



[schnouttz]

i love you

[mrtsunny]

this is so helpful! thanks!

[royourboat23]

is 200m/s really practical?

[FantasyOfLegends]

Thank you very much =)

[Zelby95]

It's amazing what a simple concept of organizing the givens into vertical and horizontal is! BUT THIS MADE ALL THE DIFFERENCE! Thanks :)

[Tabongadoo]

Oh man, this is so much better than how my teacher explained it. Time to pass that exam!

[XOSiren18XO]

@Tabongadoo Same here. Canada and its teachers. Bah, some of them are just bad at teaching.

[GREATGAIWAIN]

I thank God that people like you exist.

[yyyy2999]

I dont underestand how you get 2.9

[yyyy2999]

This is aweeeeeesome

[snowboarder1ify]

OMG THANK YOU SO MUCH. My teacher did not explain it well for my junior class at all but, now i clearly understand it. It is much easier after you split the horizontal and vertical terms. Thank You good sir!

[Kricardose]

I am very happy to see the vidoe This is our series of physics lesson videos made for our students at Earl Haig SS in North York, Ontario, Canada. Let us know if you found them helpful. M after you give this

[bebeheuy]

I Love The Video We have a number of videos so we have organized them on our school website It Can Increase My Knowledge

[Mjhond]

Steady I Really Like This Video This is our series of physics lesson videos made for our students at Earl Haig SS in North York, Ontario, Canada. Let us know if you found them helpful. Mr

[iceecream6]

Thank you for all the help!

[Dragonxsolo]

Mostly confused but will get there. In our school we refer to the SUVAT formula.

S=displacement

U=starting velocity v=Ending velocity and A for acceleration...oh god is the Dh in this video horizontal distance?

[oniro91]

ok now i'm more genius than before tanksalotXD

[melheartspink17]

Thank you! This has helped me soooo much!!!

[xxhanaxxbluexx]

Physics test tomorrow. I will probably have the biggest headache in the 15 years of my existence. But hopefully this would of help

[LiliRayofSun]

Yeah no. This guy is wrong at 0:30. When an object is THROWN UP it's acceleration is -9.81m/s squared. When the object is coming back DOWN, the acceleration is 9.81m/s squared. Same for projectile motion. There is no vertical acceleration when thrown off a raised surface, but when the object, be it a cannonball or a twig, goes down towards the surface the earth, the acceleration is - 9.81 m/s squared.

[SALENTRAT]

@LiliRayofSun when drawing a diagram, you define up or down as negative/positive, and left or right on the diagram as negative/positive. It doesnt matter which one you choose, you will get the same result, but you have to define it on your diagram like he did with the arrow pointing upwards and the + sign. The initial acceleration for an infinitesimal amount of time when dropped from a height above ground will be exactly 9.81ms^2

[MrLYTRIX]

@LiliRayofSun agreed, i was kinda confused abit when he said that, since objects going up slows down due to gravity, the acceleration is negative.

[cool12threeman]

I want you to be my teacher!!! You are unspeakable helpful!!!!!

[OfficialBassMonkey]

how did u figure the timeon the vertical column?

[MsCraze94]

(Y)

[SkiesTheLimit62]

you just saved me from failing my physics midterm tomorrow, thank you so much

[goodcake507]

hey my school does not offer physics as a coarse but would like to persue a degree in advanced physics and nuclear engineering any tips on how i could be prepared for my first day in college will i be behind the crowed or should i persue outside help to get me pre pared

[jensons88]

it's a good illustration. you could also watch a demonstration video on my channel. it shows a program that does projectile motion automatically. if you're interested on how the program works, you can visit the web site that's also on my channel.

[rapstreetz]

Thanks a lot. Really really helpful.

[Diegonators]

ih y goodness i thnk i may pass my pass my test <3

[soulxofxgirl]

very helpful thx

[SUMEET2459]

Thanks alot . it really helped me alot

[CookieSpring]

My teacher told me to multiply by 2 to get the time for the horizontal...

[804YankeeFan]

Hey, I have an question and maybe you could answer it.

Don't we need to consider the earth's orbit to determine where a projectile lands. Because in every projectile motion question, they just use the magnitude of the displacement as where it lands from the starting point.

[Johnnyman67]

My goodness... What I'd do for an instructor who can teach as well as this man in my daily life. Thank you sir, SO much.

[georgiegirl5542684]

thanks, u a wonderful teacher for home

[qsierra1]

I like how organized this is. I am a student that needs to know why about everything. I can see what I need and how it is used this way. Very helpful.

[Reem2013]

You saved me from failing a huge test

Thaank you <3 FROM THE PEOPLE OF DUBAI !

[jkhotrod360]

Thanks for taking time to make these videos, i hope you realize how much it helps!

[PhysicsEH]

@jkhotrod360 Thanks for letting us know. Glad we could help.

[benhendrick1]

Thank's for your help. Very helpful video.

[PhysicsEH]

@benhendrick1 Glad we could help.

[mousetail90]

what about a full parabola?

[PhysicsEH]

@mousetail90 Try the same title video but part 2 I think this is what you are asking about. Hope it helps.

[Bakugantsuvai1]

@PhysicsEH Is the parabolic motion applied to a missle?

[abelardofloresd10]

how do you solve for t?!!!

thats what always confuses me, i cant figure out the algebra

rearranging is complex for me

[Zolfigarr]

@abelardofloresd10 -40/-4.9 = 8.16 then you get the t squared ,you must find t so you square root 8.16 and TA DA =2.9<<ROUNDED

[PhysicsEH]

@abelardofloresd10 With d=V1t +1/2at^2 you can't rearrange it if V1 is not zero because it becomes a quadratic equation and you have to use the quadratic formula to solve for t. If V1 is zero as in this example you get d= V1t + 1/2 at^2 and so -40 = 0 + 1/2(-9.8)t^2. Multiply the 1/2 and the -9.8 you get -40 = -4.9t^2 now divide boht sides by 4.9 like this -40/4.9 = -4.9/4.9 *t^2 and the result is -8.16 = - t^2 so now cancel the (-) from both sides and take the square root and you get about 2.9

[shehab1414]

Thanks a lot :)

i really benefited a lot

PLZ keep on doing this :)

and thanks again

((Subscribed))

[PhysicsEH]

@shehab1414 Thanks for the kind comment. Glad we could help.

[idiotlover03]

thank you for this video. It helped a lot :D

[PhysicsEH]

@idiotlover03 Glad we could help

[alextheromanian]

if i had teachers like you i wouldn't feel stupid in life or like i have some ADD since i cant get it...half paying attention to this made more sense and was easy to remember than struggling to pay attention in class wondering what way i can organize the scattered notes he puts up on the board.

[PhysicsEH]

@alextheromanian Thanks for the very nice comment. Glad to help.

[PhysicsEH]

@alextheromanian Thanks for the very nice comment. Glad to help.

[SiikP90]

You guys are F- ing Awesome!!!!!!

[PhysicsEH]

@SiikP90 Thanks. We're glad to help.

[eaglesgogirl]

wait so is the V2v neccessary info or do we just not solve for it?

[PhysicsEH]

@eaglesgogirl Hi. It depends on what you are asked for. If you are asked for the final velocity when it hits the gound, then you need both Vh and V2v to find this. We have a video that shows this called "Physics Lesson: Projectile Motion Part 3" Otherwise you don't need it to solve the problem in this video. I hope this helps.

[eaglesgogirl]

@PhysicsEH Thank you, I understand. :D

[kabilan83]

ur d coolest of d cool man thanks

[PhysicsEH]

@kabilan83 Thanks for taking the time to let us know we helped. Best of luck with your course.

[hardyx91252614]

@PhysicsEH You are the Best Physics Teacher ever! Thanks alot! you made me Pass my Test Perfectly!

[PhysicsEH]

@hardyx91252614 Best comment we have had in a while. Thanks!

[hardyx91252614]

@PhysicsEH Thanks to you. :)

[trammi10000]

you guys make physics very easy to understand. Great job!

[PhysicsEH]

@trammi10000 Thanks. We love to hear positive comments.

[PhysicsEH]

@Bond071000 Thanks for the kind comments. We are glad to help.

[PhysicsEH]

@Bond071000 Glad we could help.

[mozahemi]

you guys are th e best!!! so much better than my prof. mine doesn't makes sense at all and goes too fast without asking us if we understand what the hell she's talking about!

Please do more videos!!! :D

[PhysicsEH]

@mozahemi Thanks for the compliments. Glad we could help.

[gatecrusher02]

YOU ARE THE BEST TEACHER EVER!! :D

I wish you were my physics teacher. Even though english is not my normal medium for communication I understood your explanation very well. :D

[csegul1]

thxs man

[mcaruana1]

@csegul1 You're welcome.

[rgarciajr4]

Wow!! i was so down about not understanding my physics homework... and because of you i understand it. thanks a lot. great teacher/professor.

[PhysicsEH]

@rgarciajr4 Hi. Thanks for taking the time to let us know it helped. We love to hear that.

[PhysicsEH]

@RefinedCode Glad to help. Best of luck with your exam.

[ItHappens117]

This is taught in 12th grade at Earl Haig? At Mackenzie, this is gr.11 material :(

[PhysicsEH]

@ItHappens117 Hi. Yes, we moved a few things around to make both courses flow better. Good luck on your exams.

[vb4des]

I LIKE IT ... thanks :)

[PhysicsEH]

@vb4des Glad to hear you liked it. Thanks for the comment.

[MastaAlexo]

Sir, you make learning physics look easy. You are, from what I can see, an AMAZING teacher!

[PhysicsEH]

@MastaAlexo Thanks for taking the time to leave such a nice comment. Glad we could help.

[AinahMAx]

What if what is asked is the final velocity??

[PhysicsEH]

@AinahMAx Hi. We have a video on that topic. Look for "Physics Lesson: Projectile Motion Part 3 for High School"

You can search it on YouTube or if you go to our website listed in the description you can find the link with all our videos. I hope this helps.

[AinahMAx]

@PhysicsEH Thanks you! :D i have a big test tomorrow and this video really helped!

[PhysicsEH]

@AinahMAx Glad to help. Good luck on your test.

[PhysicsEH]

@lolmunkyboi Thanks for the compliment. We appreciate you taking the time to let us know you liked our videos.

[TintedRedFilms]

Thanks a lot! I missed 3 days of school before the beginning of our Spring Break (got sick), and missed quite a bit of notes. I then returned to school, to find out that our exam was the next day.

[PhysicsEH]

@TintedRedFilms I hope yout exam went well. Glad we could help.

[MusicTewns]

I don't understand how you know which formulas to use, there are so many...

[PhysicsEH]

@MusicTewns The horizontal direction it is uniform motion so there is only one v=d/t For the vertical theres 5 acceleration equations. You must be given at least 3 of the 5 variables in these equations and you decide which of the other ones you need to solve for. You look at the 5 equations and find the equation that has the 3 variables you have and the one you are looking for. That's the equation you use. Check our video Physics Lesson: Acceleration Equations Part 1 Kinematics for High School

[averychristina]

thanks so much, that was really helpful!

[PhysicsEH]

@averychristina Thanks for letting us know. It's nice to hear we've helped.

[Powerdude29]

I'm confused u shoulda done the math for the 2.9 seconds for slow people like me but still great

[wabisk3]

Really vivid explaining and well set out, thank you that was really helpful! keep them coming! :)

[PhysicsEH]

@wabisk3 Great to hear they helped. Let your friends know about us.

[PhysicsEH]

@brooklynhearts Thanks for the kind words. We are so glad we could help you. Let others know about us.

[LightReincarnation]

YES!

[PhysicsEH]

@LightReincarnation Thanks, glad to help. Tell your friends about us.

[LightReincarnation]

@PhysicsEH Thanks to you sir I covered a semester in 1 day and passed the test with a 94

[PhysicsEH]

@LightReincarnation Thanks for letting us know. You made my day.

[64647936]

Hey, calculated your working and i dont think tt answer for time is 2.9, i'm not sure and pls correct me if i'm wrong, cause from my calculations it isn't 2.9. Thank you, great vid!

[64647936]

@64647936 OH wait, i just got 2.9, sorry, my mistake, thx for the vid!

[PhysicsEH]

@64647936 Glad you got it. Good luck in your course.

[nickey7402005]

Man.... i had you last year, and i wish Mr. Motica could teach it like you. Wish you were my teacher

[ahlawy1993]

Thx u very much u really helped me a lot about this

[PhysicsEH]

@ahlawy1993 Great. Glad to help.

[HrdCore1337]

dudeee, you have no idea how much you cleared things up for me

[PhysicsEH]

@HrdCore1337 Hi. Great! Thanks for letting us know we helped.

[HrdCore1337]

@PhysicsEH the only thing is that could you explain how to calculate y-max?