Finally found a video that truly helped me understand the intuition behind phy. It's downright horrible to sit in phy class without understanding the concept and gets me to feel really bad for lacking the physics intuition but now I know where to go. Thank you Khan Academy. Can see myself visiting the channel for my 11th and 12th a lot
Thank you, this is really eye-opening and well explained. Even though I already knew how classic physics, it made me understand some missing points in my knowledge.
I think the note at 1:58 can be a bit confusing, which states: "...technically gravity causes tension, which then pulls the mass right or left" Gravity causes tension, yes. But the one that that pulls the mass to the right or left is ALSO gravity, not tension. The way you used "..causes tension, which then.." seems to imply that tension causes the latter part of the sentence, which is certainly not the case. Tension does not pull the mass right or left because it's acting in a direction that's not causing any moment in the oscillating direction, where; > Tension direction: along the string at the current position > Oscillating direction: rotation with respect to the string origin The tension direction makes its magnitude have no effect to the mass in the oscillating direction, which requires moment (perpendicular force component x perpendicular distance) to be affected.
3:06 Some people will say though, "You should be impressed because this could get you grades and college and job". Boring people will, who don't even like science.
Joaquib how is it arrogant it’s true. If your doing something and you want to do it well you should enjoy the science behind it. Not just what you wanna get from it. It’s a very boring and unmotivated view
4-The logarithmic decrement of a pendulum is δ = 0.003. Find the number N of complete oscillations for halving the amplitude. 5. Sound vibrations with frequency = 0.5 kHz and amplitude A of 0.25 mm are propagating in an elastic medium. A wave length λ is 70 cm. Find the velocity v of the wave and maximum velocity ξmax of the particles of medium I want to solve these questions
No because its displacement is at the greatest and where the displacement is large there is a large restoring force because force (and therfore its acceleration) is proportional to displacement.
Acceleration isnt directly propirtional to vel. then why cant it be? Velocity can be increasing when acceleration is decreasing so its gaining less and less over pass of time
Just look at the definition,acceleration is rate at which velocity changes with time, when v=0 the velocity will change in a much less time making the acceleration maximum because of maximum restoring force
@@abdirazaqali8921 SCENARIO with velocity = 0 and big acceleration ---Think about being in your car. At the start, the engine is turned off and you're at rest, which means velocity = 0. Let's call this time 0. But you are in a hurry and want to get going, so you turn on the engine and press down on the gas pedal, all the way down. What is happening at time 0.01 seconds? You're just beginning to move, so your velocity is pretty much near 0 but, at the same time, you're accelerating a lot (in fact, acceleration should be at its maximum), which is your velocity is changing a lot from a second to the next: depending on the car you're driving, after 2 seconds you may well reach velocities up to 100 km/h (electric cars have greatest acceleration).
This case assumes this system is linear, roughly meaning that everything original remains as it is (no permanent spring deformation, no mass change, the surface conditions maintain, etc). In the real world, where non-linear systems are more realistic, permanent deformation can occur on the string which can cause a new equilibrium position.
1. A 10 g-particle moves as function of time as follows x= 2 ∗ 10−4 sin 8𝜋𝑡 (cm). Find a force F when = 0.1 s and the total energy E of a particle. 2. A particle takes part in simple harmonic motions. The maximum displacement of the particle is xmax= 10 cm, the maximum velocity is vmax = 20 cm/s. Find the angular frequency ω and maximum acceleration amax of this particle I want to solve these questions
Finally found a video that truly helped me understand the intuition behind phy. It's downright horrible to sit in phy class without understanding the concept and gets me to feel really bad for lacking the physics intuition but now I know where to go. Thank you Khan Academy. Can see myself visiting the channel for my 11th and 12th a lot
"This thing will blow up..." That was funny and true which made it more funny lmao X-D
This is extremely helpful! thank you! You literally saved kids who have a bad AP physic teacher.
This was so clear and straightforward. Thank you so much!
Thank you, this is really eye-opening and well explained. Even though I already knew how classic physics, it made me understand some missing points in my knowledge.
I love the way David explains things
Who is that?
@@jinxabyss1484 The instructor of this lecture.
i love that black screen, it good for my eyes
*directly proportional.. 2:33.
there are different types of proportionality mainly directly, indirectly and constant. being specific could help
Awesome now I understood everything.
Fantastic explanation!
Excellent video; clearly explained. Thank you!
11:53 because your ex, even though it's really negative at that point 💀
ty so much. this video helped me understanding it. I was really confused bc acc and f were greatest when v was 0 but I get it now. thanks alot
That's amazing
I think the note at 1:58 can be a bit confusing, which states:
"...technically gravity causes tension, which then pulls the mass right or left"
Gravity causes tension, yes. But the one that that pulls the mass to the right or left is ALSO gravity, not tension. The way you used "..causes tension, which then.." seems to imply that tension causes the latter part of the sentence, which is certainly not the case.
Tension does not pull the mass right or left because it's acting in a direction that's not causing any moment in the oscillating direction, where;
> Tension direction: along the string at the current position
> Oscillating direction: rotation with respect to the string origin
The tension direction makes its magnitude have no effect to the mass in the oscillating direction, which requires moment (perpendicular force component x perpendicular distance) to be affected.
Luq my man. I didn’t expect this comment, but excellent work bro.
Wooooow thank you
This is just wow explanation. 👌🏼 🙏🏿
Amazing class.
Great video.
Omg youre I am learning better in your videos than my physics teacher!!!
This is superb! ✨️
great explanation
muy bueno
Wonderful explanation
3:06 Some people will say though, "You should be impressed because this could get you grades and college and job". Boring people will, who don't even like science.
very arrogant but at least a conscientious viewpoint
Joaquib how is it arrogant it’s true. If your doing something and you want to do it well you should enjoy the science behind it. Not just what you wanna get from it. It’s a very boring and unmotivated view
Fantastic like always
Nice 👍🏻📚☺️
4-The logarithmic decrement of a pendulum is δ = 0.003. Find the number N of complete
oscillations for halving the amplitude.
5. Sound vibrations with frequency = 0.5 kHz and amplitude A of 0.25 mm are propagating in
an elastic medium. A wave length λ is 70 cm. Find the velocity v of the wave and maximum
velocity ξmax of the particles of medium
I want to solve these questions
This was very helpful. I have a question. If the body keeps on moving and we neglect air resistance, when and how will it come to it's equilibrium?
never !
Great i like your videos
When the spring is stretched or compressed at max, shouldn't the acceleration be zero even if for a very tiny fraction of time.
No because its displacement is at the greatest and where the displacement is large there is a large restoring force because force (and therfore its acceleration) is proportional to displacement.
Indian IIT JEE teachers pls teach like this
pls teach physics not how to get good marks
You have *_Alakh Pandu._* What do you think about him?
@@lelouchlamperouge8093 He is not good but sometimes he helps.....
Check out "Oscillation" by Wild Nothing :D
Awesome
How is acceleration greatest when velocity is zero? I am a little bit confused🤔
Acceleration isnt directly propirtional to vel. then why cant it be?
Velocity can be increasing when acceleration is decreasing so its gaining less and less over pass of time
because the force is greatest at those points (since displacement is maximum F = -kx). F = ma
Just look at the definition,acceleration is rate at which velocity changes with time, when v=0 the velocity will change in a much less time making the acceleration maximum because of maximum restoring force
@@jit554 when velocity is zero, the object is at rest...therefore no acceleration
@@abdirazaqali8921 SCENARIO with velocity = 0 and big acceleration ---Think about being in your car. At the start, the engine is turned off and you're at rest, which means velocity = 0. Let's call this time 0. But you are in a hurry and want to get going, so you turn on the engine and press down on the gas pedal, all the way down. What is happening at time 0.01 seconds? You're just beginning to move, so your velocity is pretty much near 0 but, at the same time, you're accelerating a lot (in fact, acceleration should be at its maximum), which is your velocity is changing a lot from a second to the next: depending on the car you're driving, after 2 seconds you may well reach velocities up to 100 km/h (electric cars have greatest acceleration).
Is it possible to create a new equilibrium position?
This case assumes this system is linear, roughly meaning that everything original remains as it is (no permanent spring deformation, no mass change, the surface conditions maintain, etc).
In the real world, where non-linear systems are more realistic, permanent deformation can occur on the string which can cause a new equilibrium position.
1. A 10 g-particle moves as function of time as follows x= 2 ∗ 10−4
sin 8𝜋𝑡 (cm). Find a force
F when = 0.1 s and the total energy E of a particle.
2. A particle takes part in simple harmonic motions. The maximum displacement of the particle
is xmax= 10 cm, the maximum velocity is vmax = 20 cm/s. Find the angular frequency ω and
maximum acceleration amax of this particle
I want to solve these questions
How do you think it should be solved? I'd be happy to help if you prove your effort in trying to solve it on your own first.
@@luqmaans I tried I couldn't solve other than number 1
@@luqmaans Can I communicate with you through private messages?
@@صعيديفيأوكرانيا2 Yes sure. Please show how you think it should be solved, so that I can figure out the best way to explain to you.
Weren't you suppossed to say de-acceleration instead of acceleration?....
The cos() graph is wrong. In this position of sin() it starts from y=0 value and goes down.
What if the mass is always expanding?
bro this isnt deepwoken ost😭😭
Woo
poor spring
very bad speaking
Maybe because you don't know English.
Btw I know English but you have not any idea about how to behave with others
@@crazystudybymanofmath5143 better than many other teachers