Horizontal velocity remains constant

This video is a clip from MIT lectures by Prof Walter Lewin. Explaining, that the horizontal component of velocity in a projectile motion remains constant.

[@locom16deen78]

see at my university the prof would just draw a diagram or just say it. I love it when they actually show how it works in real life. Top job to the professor

[@sanchitmehta6513]

Which University??

[@kernal2077]

@@sanchitmehta6513 in this video? it's MIT, best institute of technology in the whole world.

[@sanchitmehta6513]

@@kernal2077 he is talking about his University.

[@madeinheaven4086]

It's a simple concept you dont need any drama to understand that

[@richiekong6843]

@@madeinheaven4086 Seeing is believing

[@benlarrabee9581]

thanks for including the wide angle. Gives the whole effect.

[@huntermullens5202]

ok

[@sukanya3411]

THAT was the most epic out-tro

[@payarelalbharaty6724]

Wooww nice demonstration... 🙌🙌

[@SuperRaduf]

Never ever bored if i hade teacher like him

[@theclapfather6265]

ماشاءالله عليك يا اخي مبدع اخوكم من العراق

[@vichy7661]

Nikola Tesla would love these classes, he'd likely teach the same way.

[@punishalltrolls]

flat-earthers still don't get it

[@rattlerjake2362]

OK idiot, doing a canned experiment in a classroom is CONTROLLED and NOT the same as outside in the actual atmosphere. Why don't you get in a convertible car or bed of a pickup truck and while traveling 55 miles per hour launch a basketball or baseball into the air and see if it lands back in the car/truck! You globeheads are so gullible with these "bill nye the lyin' science guy's" BS experiments.

[@ir8free]

Rattlerjake Someone threw a basketball out a moving car's window, and it followed until hitting the street. Physics experiments trigger flattards.

[@flookd5516]

Rattlerjake Why does conservation of momentum apply in the atmosphere inside but not outside? Why is an experiment using a truck not controlled?

[@rattlerjake2362]

So tells us what this experiment has to do with the flat-earth vs globe-earth argument! I want to hear it directly from you, so I can show you what an idiot you are!

[@flookd5516]

Rattlerjake You can't answer my questions? FE'ers repeatedly claim that on a rotating Earth a ball thrown upwards would land at the point it was launched, on the grounds it loses all forward momentum when it breaks contact with the thrower. They claim that the ball returning to the thrower is evidence that the thrower isn't moving, i.e., that the Earth is motionless. The above experiment demonstrates the assumption of loss of momentum is false.

[@saliyasarvarnavar5386]

Physics works.. ❤️

[@Butterflies_Keditz]

12 yrs old video 😮 watching in 2024😂

[@samgaddameedi0077]

Did the ball fall back in the gun ?

[@mkranger153.]

Please the link of the full video 🙏

[@user-rf3xu1zn3l]

Excellent video!!

[@big_time_2023]

ليه ما يكون عندنا نفس ذي التجارب في مدارسنا؟!!!!

[@wafdanubaidillahridwan1860]

How to make the train move with the constant velocity? Since we know that force make some acceleration.

[@Johnlanzer]

Well since the train have to contend with air resistance, and the friction between the rails and the wheels, there is a just enough force to keep the train moving at the same speed against the forces of air resistance and friction.

[@Shimulnath96]

Making ta path frictionless

[@albertmendoza1468]

There is a force, but it only acted for a short while and added a little bit of speed. To prevent it from slowing down, the device is designed to lower the friction between the train and the rails. This will sufficiently give an approximate constant velocity.

[@siddharth57722]

Physics works!

[@emjay9458]

So if I were to throw a ball through the sunroof of a car going at a constant pace of 200mph while it drives through the road without any bumps or objects to decrease its velocity, would the ball “catch” up to me.

[@iaexo]

No because of air resistance

[@albertmendoza1468]

Michael is correct. Easier way to test this is to just throw it upwards inside your car and see if it lands on your hands.

[@akshanshkaushal9422]

@@iaexo Air resistance was also in the experiment performed by the professor

[@iaexo]

@@akshanshkaushal9422 Realise that at 200mph, air resistance is non-negligible, whereas the one done by WL is at a low enough speed where the effects are not as significant.

[@Paswansonu80]

That's wht western education is far ahead

[@macondo0143]

yeah......that is why they chose a buffoon tv celebrity for president !

[@vijaykriss17]

Sir can you explain hoe the bullet speed mange the gravity force....and garvity force will attract the bullet can you tell plz

[@prabhjitsingh1138]

man my teacher made us make a project about this its 25 oercent of our grade

[@huntermullens5202]

what was the aswer

[@hywel4605]

Question: what would the result in a vacuum?

[@Imnothimaight]

same result(considering there is gravity), no air resistance there so the experiment will be even more perfect

[@competitivejourney4853]

Awesome❤️❤️

[@elifmutafoglu]

isn't he the coolest

[@mrsmilie6817]

any idea how to make this kind of model?

[@TheManjusu]

Where do you get that gun or launcher

[@harshitjuneja9462]

What if we move the cart with constant acceleration?

[@fromnorway643]

The ball will miss since it will no longer have any sideways acceleration once it leaves the cart.

[@sanjaydev398]

I am standing top of the car that running at 50mph , if i jump what will happen? fall on road?

[@nebtheweb8885]

You'll get what you deserve, thats what.

[@jaydabhi364]

Sanjay Dev If you will jump out of the car at the same horizontal speed as the car then you will certainly fall in the car once your vertical speed becomes 0.

[@drcidd8153]

Friction from the wind will slow you down. You'll hit the road.

[@sabeledger67]

DJReiko, my gut feeling would say, he still has a lot of speed when gravity has pulled him to the ground => he gets some really ugly bruises.

[@kennethhenry5056]

ignore air resistance

[@elonmuskguy8534]

what if he would have given it an acceleration?

[@herzikkimolog]

late answer* you have to give a constant force to it for gaining acceleration which is like launching a rocket with an angle, if the rocket is tended towards the route of that car (angle is positive) it's going to be ahead of that car when it hits the ground; distance between them in that moment depends on how big is the acceleration that rocket had gained. (x = 1/2 at^2 ; initial location x0 and initial velocity v0 of rocket relative to car are both zero.) this experiment is like firing the rocket just for a moment and shutting thrust off immediately (t goes to zero = dt) so it does have a velocity at start but acceleration is zero.

[@min6463]

see u wednesday (2027)

[@introvideo5064]

1:19

[@miniime01]

wow xD

[@bhavishyasharma7834]

Physics is just mathematics related to the surrounding world

[@krishnaprasad545]

What is the principle in it..I can't get it

[@sabeledger67]

the whole device & the ball have the same speed just because the ball get ejected, doesn't mean it loses its forward motion -> still same speed => and lands in the device again.

[@flookd5516]

Conservation of momentum (mass x velocity). The ball has sideways momentum when inside the moving cannon; it retains that momentum when fired from the cannon. There is a belief in some people's minds that the ball has sideways momentum only when inside the cannon and somehow loses it once fired.

[@Shimulnath96]

Projectile motion(prass)