Can the normal force be bigger than your gravitational weight?
Пікірлер: 39
@doratheexplorer4953 жыл бұрын
You're the best teacher ever sir , I really wish I could sit in your live class once . Just cannot tell you how much your videos have helped me during online classes . Love from India 🙏
@mojankhosravi45186 жыл бұрын
wow!! what an explanation... thanks a lot, I love your videos
@sea52055 жыл бұрын
Your videos are amazing thanks
@manuboker13 жыл бұрын
GREAT PHYSICS LECTURES !!! :))
@annasherchan88194 жыл бұрын
Thanks sir for ua videos which are very useful for me ....❤
@anonymousash66784 жыл бұрын
Han Solo teaches physics? amazing.
@yoprofmatt4 жыл бұрын
AnonymousAsh, Some of my other videos I'm more like Chewbacca. Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Dr. A
@sanjeevsrivastava3389 Жыл бұрын
I love u sir seriously!!!! ❤️
@syedwalihaider64978 жыл бұрын
I love you and your helping tools sir I salute you
@yoprofmatt8 жыл бұрын
Thanks Wali, I appreciate the comment. If you're interested in the tools, check us out: learningglasssolutions.com Cheers, Dr. A
@texmetchem5 жыл бұрын
Dear Professor. I understand the calculation and the "weightless experience" as an ideal case, where no air resistance ist present. Should in the reality happen, the elevator will experience a strong resistance and will fall with an acceleration less then g. The person in the elevator does not experience the air resistance, but it is still attracted by the earth and will fall with an acceleration equal to g. So the person would feel compress to the floor. Is my idea right? Best wishes!
@syedwalihaider64978 жыл бұрын
sir have you uploaded any videos regarding stationary waves and light
@attitudekingsriraajmagic46394 жыл бұрын
Respect ur lecture...sir...wonderful
@yoprofmatt4 жыл бұрын
Asb, Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Dr. A
@mr.s4a4ge582 ай бұрын
Hey 2 things i noticed. First of all g is essentially not 0 , given tht acceleration due to g does decrease with depth by a factor g(1-d/R) , but wht happens is tht the g due to both the hemispheres of the earth cancels each other. Also the hollow tunnel through the centre of the Earth wud put any object in a simple harmonic motion , with gravity as the restoring force and time period T=2pi root( R/g)
@misskyleigh2999 Жыл бұрын
If there was a hole dug all the way through Earth, would the two pieces stay close to one another or would they separate?
@mumtajkaly1410 Жыл бұрын
How is he writing backwards?
@RunOfTheHind4 жыл бұрын
...Living it up while you're going dooooowwwwnnnn...
@yoprofmatt4 жыл бұрын
Geoffreygeefresh95, Great comment, thanks. You might also like my new website: www.universityphysics.education Cheers, Dr. A
@csanilkumar54158 ай бұрын
GM ÷ 1^2 is greater than GM ÷ 6371000^2 , therefore we jumped in to the hole( tunnel) we stayed in the centre. The gravity at the centre is not zero Because GM ÷ (0.00000001)^2 ≠zero.
@imjoker38744 жыл бұрын
Hi professor I don't understand why the normal force is considered as your apparent weight; you mention we feel heavier when accelerating upwards but I thought we will feel heavier if gravity is larger than the normal force
@yoprofmatt4 жыл бұрын
imJOKER, Imagine you're falling with nothing underneath you. Certainly there is gravity, but what can you say about your weight? Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Dr. A
@SteveWideawake4 жыл бұрын
how come when a plane travelling 500 mph hit air pockets and fall the people get stuck to the roof but the ISS is falling 17000 mph and they float? If the gravity is strong enough to hold the ISS in orbit why no gravity inside the ISS?
@marionicola24474 жыл бұрын
ISS is in orbit, the plane is not . The Sun's gravitational field is strong enough to hold the Earth in place but we don't all fall towards the sun do we
@junkabogado4 жыл бұрын
At 8:20 he says there is no gravity at the center of the earth. I don't think that is quite right. There is plenty of gravity at the center of the earth, but it is pulling in all directions equally, so the NET effect of the gravitational force is zero.
@alexjohnward2 ай бұрын
Gravity in terms of a net force. Interestingly there is still some Gravity, pulling towards the Sun!
@freebazar.online3 жыл бұрын
Earth is not a perfect sphere, where is its center ?
@davidmudry56222 жыл бұрын
Why do you not use General Relativity 1915 which says Gravity is not a force? Gravity does not push or pull on matter. Only a physical connection to the ground can put a force of acceleration upwards on matter.
@yoprofmatt2 жыл бұрын
General relativity is indeed the prevailing theory of gravity but this is an introductory course and Newton's laws work exceptionally well in most circumstances. We don't want to scare students. At least not yet. Cheers, Dr. A
@davidmudry56222 жыл бұрын
@@yoprofmatt Thank you so much for your reply..! But my problem is that if Einstein is more correct than Newton, then we are teaching students that Gravity is a Force. And according to Einstein gravity is not a force. I can see no reason to teach Newton if Einstein is correct. Once again thank you.
@davidmudry56222 жыл бұрын
@@yoprofmatt From this principle, Einstein deduced that free-fall is inertial motion. Objects in free-fall do not experience being accelerated downward (e.g. toward the earth or other massive body) but rather weightlessness and no acceleration. I think it's important to teach reality, and important not to teach Newton which is just wrong.
@davidmudry56222 жыл бұрын
@@yoprofmatt You're about to go to space, and you weigh 200 lbs. The rocket takes off, soon you'll weigh 400 then 600 then 800 lbs. as the acceleration UP increases. But guess what? Before takeoff you already weigh 200 lbs. What that means is before liftoff you're already accelerating UP. Teaching kids that gravity pushes down is just wrong. No wonder people don't understand what really happened on 9/11.
@davidmudry56222 жыл бұрын
@@yoprofmatt NIST WTC FAQ 31: (Twin Towers) "Since the stories below the level of collapse initiation provided little resistance to the tremendous energy released by the falling building mass, the building section above came down essentially in free fall, as seen in videos." "In other words the supporting structure below was designed to support only the static weight of the floors above, and not any dynamic effects." Question - We have Weightless (0G), Static weight (1G), and Dynamic weight (heavier than 1G). If free fall is known as zero G, static weight is known as 1G, and dynamic weight is known a heavier weight than 1G, then by saying "dynamic effects" is NIST meaning a dynamic weight greater than 1G? (since NIST is comparing static weight to dynamic effects, I'm assuming dynamic effects has something to do with a weight heavier than 1G? IDK?) Therefore, has there ever been a name or a term for a weight that is lighter than 1G, other than just saying, "essentially in free fall"?