If I'm ever confused about a certain topic during a lesson, the first thing I do when I get home is look up one of your videos on the topic and it all becomes clear. Thank you so much, you are a literal life saver.

Informative yet concise, clear yet detailed, beautiful yet logical. Your videos are pure brilliance and I thank you for continuing your work.

Just wanted to say a massive thank you for making these videos - I personally find them invaluable. They are simple, easy to follow and informative. Thank you again!

lets do a fund raiser and get him a hd camera

How long is this piece of paper!?

A lovely video, even 7 years after. Clearly explained every bit. Thank you so much!

Congratulations on passing your A-level. Delighted to hear it.

seven years later, and this dude is out her still saving my exams... thank you kind sir. Your generosity is highly appreciated. I might actually pass physics

You're the best physics teacher l've ever seen thank you so much for your lessons

his voice is so clear!really amazing......i didnt even had to pause,,,,,its so damn perfect!

Really good and clear content, really the world is in need of good lectures like this when maths is involved!

Thank you very much for this helpful medium. Such an altruistic gesture that it must surely be driven by passion, and so I know I've came to the right place.

thank you so much! I seem to learn better from watching videos than from teachers and your videos are amazing

wow the best teacher i had ever seen until this moment thank you. continue

Thank you again, Professor, for all of your generous and wonderful physics videos

Sir your videos are amazing ! The way you explained in such detail helped me understand the topic really well. I request you to start making videos on the recent topics of A levels that has been added to the 2018 specification . I've seen so many videos but I only understand the way you explain. Thank you so much!

Honestly, you are awesome!

You may have just saved my exams...thank you so much dude :) subscribed!

thank you so much no one has ever been able to get moments through to me properly this has helped me tremendously

Thank youu so much Dr,i really love your videos,i'm in 4th year in mechanical school engineering in morocco,continue :) greeting from morocco :)

Thanks. Good luck in any exams you may be taking.

Yes you can. I just wanted to show how it is derived from moments.

DrPhysicsA; You such a human. Thank you.

thanks loads.......... :) helped me a lot... passed my a-level well... your videos were really helpful!

Thank you! I've got my physics AS exams next week and this really cleared everything up for me, i was getting so confused as i missed the lesson at college, so thanks again!

Wow thanks so much these are too helpful!!

fantastic. thank you!

DrPhysicsA - you have helped em tremendously. You have shown me that my way fo thinking in physics was terribly wrong and it has significantly improve since. Thanks a lot for your work sir! ^_^

The way our arm is, although not good in terms of mechanical advantage, but it helps us to grow stronger and muscular :D so I love it.

Brilliant Video

This was great, could you do a video on the four equations of motion?

Thanks very much . We need more videos please to cover the whole syllabus

well done , sir!

Wonderful!

would you include the weight of the sea saw too when doing these calculations?

Sir, YOUR videos is so nice...sir i request you to make more video regarding NUCLEAR physics and QUANTUM machanics...THANK YOU SIR.

Great narration 🙏🙏🙏.I am.trying to revise physics which I studied 30 years back . I am a software developer now

You don't have to be mad to use lever arrangement #3. Many engine lifters work that way so they can have clearance to actually fit the engine inside the vehicle.

Brilliant so far...:)

@李溟东 i believe the mass is 6.666666 (ext) kg The first step is simply to draw a diagram, it gets easier one you have one

I'm afraid I don't. And I was never much good at chemistry myself apart from physical chemistry which is pretty much atomic physics.

Please found out work done by an aneroid barometer in joules per unit volume ? Volume of cell cylinder of an aneroid barometer ??

Mr. Scotty.. beam me up from our final exam later please 😭 live long and prosper DrPhysicsA..

Hey, i am a automotive technician. So if i am Breaking a bolt loose or torquing a large bolt (say a head bolt) with a single arm rachet or spanner wrench. Am i applying a moment to that bolt? we have always said "torque the bolt.

you. are. amazing.

superb thnx alot

With regards to 19:13, I thought the moment of the biceps muscle would take into consideration the distance from where the muscle originates (i.e. shoulder) rather than where it inserts (just past the elbow at the proximal end of the forearm, i.e. 'E' in your diagram). In that case, the distance from shoulder to elbow is larger than that shown in the diagram, and therefore the moment should be larger too. If the distance were at the point where the muscle inserts, i.e. 'E' in the diagram, then that would mean it would be quite irrelevant where a muscle originates, but we were taught in anatomy that a muscle originating further from the elbow joint will have a greater moment than one originating closer to it. Could this just be a case of medics clearly not being physicists and having applied the concept of moments incorrectly? I would really appreciate your help, as this concept is often used as an explanation for the arrangement of muscles, as well as the biomechanics during its actions. Thank you in advance.

do you have any videos of newtons laws of motions in Alevel ?? and the newtons laws of motion in GCSE revision....... is it the same with Alevel physics?? and i need a video on turbulent and laminar flows in Alevels??

this is my favorite dr physics a video

youre the best!!

Why does the mechanical advantage occur? Not how to find it, but why does it occur? I, put 1 pound of downward force in, and if the level is arranged correctly, I get 10 pounds of force out? Where do the additional 9 pounds of force come from?

Hi thanks for the amazing videos! I needed ur advice on this, I want to do 3 Alevels in one yr, Is that possible? Can u offer ur thoughts on this plss? Thank u so much

What is the difference between a level series and GCSE series? Are they same...which series covers the full basics ?

love your videos, and do you know someone like you who teaches chemistry on youtube?

Sir although we have physics teacher , but you are the best

Is there a video about lever that also concerns the fact that the lever has volume and that the forces are exerted over an area? I am trying to calculate the torque that will be exerted on a cylindrical shaft by a ring shaped weight.

Have you seen my vid on "Classical Mechanics - A Level Physics"? They deal with equations of motion.

24:00 wouldn't you use the sum of both forces?

Thank you for your videos, they're awesome!

wow it heped me alot ...

please make a video about Couple Forces :)

Hi, i want to know why does a lever works? what actually happens? it seems so magical that the further away the effort from the fulcrum the easier it gets.

at 6:51 you said that we must add all the anti-clockwise forces and then subtract from it "N* distance to the pivot B" why is that? N is the normal force and it's equal to all the anti-clockwise forces, if we multiply it by the distance to the pivot B, the we will get a net clockwise force

I dont know of any reason why you cant. I suppose the key thing is whether you can find an educational establishment that would teach full A level courses in 1 year.

Should I do this first or Circular Motion first?

Can you please do a video on toppling! Thank you!

Is this targeted towards a specific exam board or is this general and will require your understanding regardless of exam boards (im asking this because i havent started sixth form quite yet)? Thanks very much for taking the time to post these videos as they are helpful to thousands of people.

i dont know if this is a stupid thing to ask..but if u want to lift the world as Archimedes said,supposedly u must have a very good MA rite? but how does earth gets its weight? gravitational field? where does the gravitational field comes from? the Sun?

Subbed.

Where would Archimedes stand........... Nicer than nice video, by thanks for the clear explanation ,Sir.

Hi, doctor, I have a question, could u help me please? A uniform plank of length 1.6 m and mass 4 kg rests on two supports which are 0.3 m from each end of the plank. A mass is attached to one end of the plank. If the normal reaction force on the support nearer to this load is twice the normal reaction force on the other support, determine the mass attached. Please help me!! Thank u very much!!

Do some question as an explanation please .....

On the last part isn't 2FD = 2x.0.5x30 = 30 but then Fx2D= 15, can you not use 2FD?

cheers

r at least show me what part seems wrong to you. please. May i ask your opinon on another thing. it is about black hole and dark matter. How i see a black hoel and galaxy around it all galaxy objects like asteroind, planets stars have a layer like stracture.Most likely black hole too. As i see it lairs is 1C-2C-3C-4C-5C-6C divided be speed of light (particles found in big colider most like particles from first lair, they stable there, stable at high speed/pressure),the deeper the heavier. (lairs example-lie earth or sun lairs havier to center push lighter up top) Particles constantly fusion and diffusion. example of dark matter from here, fusion and diffusion in 3C cast some particles out of lairs, with higher speed then before (then C3) if it direct down it go to C4 or C5 and fusion and diffusion there, If it direct up it go out of 1C 2C with no interaction with them (do to Einstain already did relativity (no energy exchange or interaction if speed difference is bigger then C)) out ward particle travel to the edge of galaxy (black hole is a biggest attractor and alost non particles can escape for long) the path they travel and they are is a dark matter (mass prlonget in space (compare to us)more then in one place at time) after they lose speed and get attracted to edge most likely the decay, to simple our known speed particles. (they may decay on the way). and they start to move to the BH again,and again, and again. Also, we are in black hole in 0C-1C lair 2C is the blacknes we not see) it looks ok, but sory for bad English, hope you understand me and my view. Basically i see a black hole like this, it is realy hard for me to accept it as single point and big horizone. (i so hubble deep space photos of black hole with sun like surface, it lead me to this) can you please help me calculate it or show me where i can get help with calculation.(put it in formula like stracture) Best regards Dynin A.I. P.S. part of this theory give me rotation namber of black hole and it is 22 years (360).

But does load not equal a and does Effort not equal b so would it not be a/b ???

Can someone give a clear definition of TORQUE? At the end of this video it seems to be "the sum of moments of force". Am I right? I have my doubts.

How can 2FD be written as F2d ?

SO YOU MEAN THAT IF WE TAKE THE PIVOT TO THE RIGHT HAND END , THE BODY WILL STILL NOT MOVE DOWNWARDS ?

At 7:00. Why do we have to take in account of N?You have changed the pivot point from N to B

18:03... Umm Doctor... that Load... :D

you just need to watch out on these that the Normal Force at the fulcrum is not great enough to snap the lever in half

10:41 Except the earth is the source of the gravity itself Seriously though, the videos are awesome

where is the torque part of the video

Oh sorry, thank you very much. :)

Can you do a video on quantum physics please

Are you telling me if nature was more "efficient"I could lift 350 on the incline.

just happened to pause the vid at 18:01

ممكن إضافة الترجمة الى العربية كلش محتاجيه 😭😭😢

I'm glad I'm taking German, so I know that null is zero. Also wouldn't a centimeter be .01m, and a millimeter be .001. .1m would be a decameter.

i love physics but i love weed too,can i smoke weed and learn physics?

I'm all for the moments but MsG is never good.

please upgrade video quality not clear image and therefore not understanding at all