Horizontally launched projectile | Two-dimensional motion | Physics | Khan Academy
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- Опубликовано: 28 июл 2016
- In this video David explains how to solve for the horizontal displacement when the projectile starts with a horizontal initial velocity. He also explains common mistakes people make when doing horizontally launched projectile problems.
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I'm watching this the day before my physics exam lol
how did u got?
lmao fuckin same HAHHAHAHHAAH
Im watching this just minutes before final exam
I'm watching on the day of exam, I have 2 hrs left for the exam
right there with you lol
I am such a visual learner and I do online school so it's hard for me to teach myself some things especially in physics. This really helped me, i appreciate it.
3 years later and all we have is online school
@@oneagainsthumanity7893 this person is probably in college now😪
@@josephpate7646 Damn i never thought about that 🤭😔
Hopefully the cliff diver doesn't ignore air resistance lol
If they do ignore it, then that's pretty impressive.
To those are intrested in an in-depth analysis of the physics and the gometry of teh projectile motion, with simulation and visualization I recommend:
ruclips.net/video/HPehCUv6bEY/видео.html&ab_channel=Math%2CPhysics%2CEngineering
i swear i understood everything thing more than the class
why arnt my physics teachers this good?
Looks like your English teachers aren't the best either.
Lol....same
Your profile picture makes you look like you're 5. There's literally no way you're in physics.
Svensk Gamer that could be his son -.-
@@MsOluyemi or his brother
“They REAAAAALLLY want to plug in 5m/s as the velocity in y; but don’t do it, it’s a trap.”
I like this dude already
"People are just *dying* to stick that 5m/s in there..." 😂
U clearly understand students soo damn well mate. My mind is oficially blown by your teaching.. thnk yu mate
This teacher is better than my teacher, finally someone explain this with human language, and also this teacher is fun, dont try this at home lol
Thanks! My physics teacher bores me to sleep and I end up learning some of it on my own time. Wonderful explanation!
Words cannot express how much you have helped me. My gratitude for you is endless.
I am in AP physics this year and the teacher blew through the first few “recap” lessons, I didn’t take any prior physics class so I’m in a loop lol. Very well explained!
Thank you so much!! I have a physics test tomorrow on horizontal projectile motion and you explained this really well
This guy litterally saved my grade. I am a freshman in highschool. Im not very smart but the school still decide to put me in physics. I am so lost all the time. It also doesnt help that my teacher is kind of bad at teaching. I think she might have dementia. REgardless thank you so much for this awesome video you really helped with understanding horizantally launched projectiles.
Lmao I love this! I’m in the library without headphones, and this so amusing with no sound and the captions on because of the humor. Thanks for the help!
Hey thank you for this video & explanation! Really helped me in reviewing for my physics quiz!
Really helped me, got my a in the exam! :)
Thank you so much for this! 😭 my school doesn't do lectures but instead just give us notes. This topic, they didn't really elaborate about this one and tomorrow is our exam, FINAL EXAM. 😭. Now I understand everything about this now 😭
Got a test tomorrow and I have no idea what I'm doing, I'ma watch this and hope it helps
Great video. This just helped so much! I was having such a hard time with this. Thank you!
The most open person ever. YOU ARE THE BEST, DAVID
you save my night! thanks a lot!
I found this extremely helpful. I really appreciate what you guys do. Thank you
thank you so much, this really helped me finally understand this
BASED DAVID!!! Thank you
This has to be the best video ever.
Thanks for the refresh!
Thank youu
Thank you this was very helpful!!
Thanks. It helped me a lot
Thank you very much for this.
Thank you. This video helped me a lot
great video ,i understood everything ☺
I searched "why greater heights provide further distance when jumping into water" because of the movie "Deep Water Horizon" showing Mark Walberg climbing higher up the drilling platform before jumping to clear the fire in the water. Now I know why he did what he did. And your teaching skills are amazing
How do you do this if you’re given the range but not the y value
What a beautiful video. Explained so well. Great teacher.
I finally get it . Thank you
Yes. I could have been a genius with this sort of tuition. Cheers 🍻
BEST EXPLANATION EVER!!!
Thank you.
This really helps me.
Thank you so much.
thank you I love you.
Such a good Explanation 👍👏 It helped tnx 😊
Thanks this was very helpful
aweosome man. very good explanation
More efficient than my phy classes
I love this. Thank you.
Thank you!
Thank you so much it helped a lot
this is great thanks!
So amazing thank you
you should be my physics professor!
I love the way you teach
thank you very well explained
I’ve learned more from this than 4 months with my teacher
I love this guy. Good humor and explains in the easiest way. But I was looking for something else. I knew how to solve this problem. I was searching for muzzle velocity. But got caught still. hahah
learning this 1 hour before our examinations
Can you do colliding??
This stuff makes a TON more sense when you have a calculator to help with finding square roots
U are really a good tutor
THANK YOUUUUU!!!!
I'm watching this DURING my physics exam
How would we determine the angle at which the person hits ground at various distances?
thanks for it😁
perfect explanation
Thankyou so much
This literally is more helpful than the videos my teacher makes
thank u !! my physics textbook nor teacher does this good of a job lol
Basically use eqns of motion and apply proper sign convention. For other cases too, when projected at an gle theta above and below horizontal
thk man appreciate
Thank you my good sir
Thanks
God bless khan academy
Very nice
How do you find the height of the cliff given the velocity and the the distance it landed?
Thank you so much! Im not going to fail my physics test tom
Physics I see you
Thank for the video sir
good stuff.
a video not made by khan? praise the sun
Like Bucky Roberts, but in Khan Academy! Great video!
lol, exactly, but this one is funner
bless you sir
the sound effects are great, i like Sal, cuz hes prob like super smart af, but this narrator is great too, 1:45
i genuinely wanna meet this guy
This is good
what if we needed to find the total distance?
My teacher accent is kinda hard to understand so helps out a lot. Thank you.
What if we are asked about the horizontal and verticle components of the velocity when the object hits the water?
life saviour
What we solving for how far, are we solving vertically or horizontally?
Any idea what program they use
awsome
can i ask why you multiplied both sides by 2 on the equation of getting the time?
My saving grace
taking the class next year wish me luck!
Justin Kim good luck
try hard
do we only give a e -9.8 going upwards if it is in free fall?
A bullet is fired 30deg to the horizontal with a speed of 200m/s. The acceleration of the bullet is 15 m/s^2 vertically downward
What is the change in velocity after 2 seconds?
Hey! Initial velocity= 200 m/s, final velocity after 2s= 186.81m/s, the change in velocity after 2s is -13.19 m/s.
Velocity only changes during vertical motion. So, we are neglecting the horizontal motion since the velocity here is always constant.
During vertical motion,
Acceleration =Δv/t.
Initially, during the vertical motion, the initial velocity is usually zero.
15ms-² = Vf - 0./2s.
Vf = 15ms-² × 2s.
Vf = 30ms-¹.
ΔV = 30 - 0 = 30ms-¹.
Regarding the value of downward acceleration due to gravity, why did it happen that it is negative? When in fact the object/body is accelerating not decelerating? Can someone explain?
The sign on acceleration has nothing to do with whether the object is speeding up or slowing down. A negative sign on any kinematics quantity just means that it is opposite the direction you arbitrarily define as positive. It is customary to define up as positive, but you don't necessarily need to do this.
5:25 best teacher ever
lol
Omg Holy Shit, this came in clutch for my physics exam.
Even If 20% of the teachers in the world start teaching like this, the world will advance a lot faster!!
My man
is there a vertical version of this?