This whole playlist is an exam saver. I understood those concepts instantly that I struggled to understand the whole year. Thank you so much sir. May God Bless you with everything
I don't understand why do we have to add 3.0 to 5.0cos60😭😭😭 and why r there 2 vectors acting horizontally (edit: ok so I sort of get it you are basically using Toa cah soh to split up the 5N into horizontal and vertical and u add 3N to 5.0cos60 as its the total horizontal force and then you use pythagoras' theorem to find the resultant vector?)
@@zhelyo_physics cheers mate :). I am an adult hoping to start the A2 A level Physics and Maths in college and I’ve been given 2-2.25 months to learn as much AS A level physics content; achieve pass grade in the entry test. Is this possible to do within 2 months ?
Excellent question. We add individually the x and y components of both vectors. The resultant x component = 3.0 + 5cos(60). In this equation 3.0 is the x component of the first vector and 5cos(60) the x component of the other vector. Hope this helps!
@@shho.n1829 excellent question, nope 5cos(60) is the component of the 5.0 vector, to that we need to add the 3.0 N vector in the horizontal direction to find the total horizontal component. Hope this makes sense!
absolutely, as long as they are tip to tail we would get the same result. A good way of thinking of where the resultant goes is to think intuitively - i.e. if I push something to left and up it should go diagonally to the left and upwards. Hope this helps!
excellent question! so 3 is a horizontal component and 5.0cos(60) is also a horizontal component so we are just adding horizontal component with horizontal component. Hope this helps!
When adding vectors we need individually add the horizontal and vertical components. In this case to find the resultant horizontal component we need to add them as they are all in the horizontal direction. Hope this helps!
it was just an example, this was supposed to be done with "measuring" with a ruler which is difficult when I am using a virtual ruler : ) Hope this clears it!
last q: topic is "non-perpendicular" but drawn as a perpendicular one, so if you draw the 5N line after the 3N line it makes sense as a "non-perpendicular triangle" watch q3 and you'll understand th-cam.com/video/tMr--psNVxM/w-d-xo.html
last q: topic is "non-perpendicular" but drawn as a perpendicular one, so if you draw the 5N line after the 3N line it makes sense as a "non-perpendicular triangle" watch q3 and you'll understand th-cam.com/video/tMr--psNVxM/w-d-xo.html
So we are just finding the x component of one vector and it's y component. Then we are doing the same for the other vector. At the end we add x component from one with the x component with the other and a y component from one with the y component of another. Hope this helps!
last q: topic is "non-perpendicular" but drawn as a perpendicular one, so if you draw the 5N line after the 3N line it makes sense as a "non-perpendicular triangle" watch q3 and you'll understand th-cam.com/video/tMr--psNVxM/w-d-xo.html
This finally clicked in my head, after months and months it finally clicked, thank you so much good sir❤
fantastic to hear, thank you for the comment!
This whole playlist is an exam saver. I understood those concepts instantly that I struggled to understand the whole year. Thank you so much sir. May God Bless you with everything
Very glad to hear it helped! Thank you for the comment!
Really great video! Thank you so much! 🧨
thank you for the comment!
i've been struggling with vectors my whole life but now I understand it. Thank you so much, this is a great video!!!!
Wow amazing to hear! Thank you for the comment!
Thankyou for your hard work.
Anytime, thanks for the comment!
frère, merci beaucoup pour cette vidéo, je l'apprécie vraiment, elle a été très utile. Je t'aime
Great explanation Sir.
thanks a lot! Glad this is useful!
Great video man 🔥
thanks a lot!
I don't understand why do we have to add 3.0 to 5.0cos60😭😭😭 and why r there 2 vectors acting horizontally (edit: ok so I sort of get it you are basically using Toa cah soh to split up the 5N into horizontal and vertical and u add 3N to 5.0cos60 as its the total horizontal force and then you use pythagoras' theorem to find the resultant vector?)
exactly right!
@@zhelyo_physics ok Ty I love u😍😍😍😍😍😍😍😍😍😍😍💖💖💖💖💖💖
I had this same issue
What is toa,cah, soh
@@marwahrahman2604It's trigonometry. e.g Toa means Tan=Opposite/adjacent.
at 24:50 how do we know where tp place the angle sign to find the direction angle? why couldnt it have been in the middle of 7 sand 4.33?
the question would typically specify whether it wants the angle to the horizontal or the vertical. Hope this helps!
thxx so much u help alot
Anytime, my pleasure!
How are you rounding up your decimals ?
Normally, looking at the sig figs given in the question
@@zhelyo_physics cheers mate :).
I am an adult hoping to start the A2 A level Physics and Maths in college and I’ve been given 2-2.25 months to learn as much AS A level physics content; achieve pass grade in the entry test. Is this possible to do within 2 months ?
for sure. I have filmed most of the AS content starting from almost no prerequired knowledge. Drop a comment if you don't understand something! : )
hello, at 22:55 I did not understand why fx will be as it is shown, why is 3.0 added to 5cos60 ?
Excellent question. We add individually the x and y components of both vectors. The resultant x component = 3.0 + 5cos(60). In this equation 3.0 is the x component of the first vector and 5cos(60) the x component of the other vector. Hope this helps!
@@zhelyo_physics what are we figuring out by solving 3+5cos(60)? Can’t we figure out Fx by doing 5cos(60)?
@@shho.n1829 excellent question, nope 5cos(60) is the component of the 5.0 vector, to that we need to add the 3.0 N vector in the horizontal direction to find the total horizontal component. Hope this makes sense!
i literally love your channel!
Glad to hear! Thanks a lot for your comment!
@6:00 couldn't we have moved the 3.0 N vector instead of the 4.0 N one? and also how are we supposed to know where the resultant vector goes?
absolutely, as long as they are tip to tail we would get the same result. A good way of thinking of where the resultant goes is to think intuitively - i.e. if I push something to left and up it should go diagonally to the left and upwards. Hope this helps!
Great explanation indeed. But just a question, how did we know in the last part that we had to use the Pythagorus theorem?
generally we can apply it anytime we have perpendicular vectors (cosine theorem if not perpendicular). Hope this helps!
I still don’t understand why you had to add 3 + 5.0cos(60) because doesn’t 5.0cos(60) represent the y axis only what’s the point of adding them ?
excellent question! so 3 is a horizontal component and 5.0cos(60) is also a horizontal component so we are just adding horizontal component with horizontal component. Hope this helps!
Can we say that the xsin(y) will always be opposite to the angle?
yep. Sine is always defined as the opposite. Hope this helps!
19:19 i just lost all my 3 braincells
Good explanation
Thank you!
How do you know which direction the resultant vector goes in
After you find it, do inversetan(opposite/adjacent) of its component to find an angle. The angle specifies the direction. Hope this helps!
Piranha gun, oh yeah!
How do you answer so many comments????😂.Love your videos by the way.
thank you very much! I enjoy answering physics question so I try to answer all of them, tricky sometimes but I do try : ) Thanks for the comment!
do your videos apply for all exam boards?
yes! : )
@@zhelyo_physics thank you!
is it possible if u can upload your notes thx
Sorry pal only the videos are available for now.
@@zhelyo_physics it's fine thx btw great video
why do you add 3.o with the 5.0cos60 at 22:59
When adding vectors we need individually add the horizontal and vertical components. In this case to find the resultant horizontal component we need to add them as they are all in the horizontal direction. Hope this helps!
At 15:04 I don't understand how you get seven plugging it into the calculator is giving me a hard time I keep getting 19 not 7
it was just an example, this was supposed to be done with "measuring" with a ruler which is difficult when I am using a virtual ruler : ) Hope this clears it!
@@zhelyo_physics yesss it does thank you so much God bless your existence
@@zhelyo_physics but I guess I quoted wrong I meant 18:09
@@Seeynthia Oh I see, I think I have not included a step, you get F^2=49, but then you square root it to get F which is 7. Hope this helps!
last q: topic is "non-perpendicular" but drawn as a perpendicular one, so if you draw the 5N line after the 3N line it makes sense as a "non-perpendicular triangle"
watch q3 and you'll understand
th-cam.com/video/tMr--psNVxM/w-d-xo.html
Sir, what about the parellogram method, can we use that?
yes for perpendicular vectors but first they need to be tip to tail to ensure the resultant is in the right direction.
i dont understand the last question
Sorry to hear this! Which part exactly?
This video might be good to watch first on lots of problem examples: th-cam.com/video/tMr--psNVxM/w-d-xo.html
last q: topic is "non-perpendicular" but drawn as a perpendicular one, so if you draw the 5N line after the 3N line it makes sense as a "non-perpendicular triangle"
watch q3 and you'll understand
th-cam.com/video/tMr--psNVxM/w-d-xo.html
@@tharinperera7587 thank you ! it was actually very helpful
thankyou sir
anytime!
I understood everything except for the last one 🙁
So we are just finding the x component of one vector and it's y component. Then we are doing the same for the other vector. At the end we add x component from one with the x component with the other and a y component from one with the y component of another. Hope this helps!
last q: topic is "non-perpendicular" but drawn as a perpendicular one, so if you draw the 5N line after the 3N line it makes sense as a "non-perpendicular triangle"
watch q3 and you'll understand
th-cam.com/video/tMr--psNVxM/w-d-xo.html
A Level guaranteed Sir? 😂
What..?