His skills with writing equations backward is mind boggling.

Hello teacher. How can I find the shooting angle of a ball to hit a basketball hoop, if I have the speed, gravitational acceleration and vertical and horizontal distances? I can't deduce an equation to find the angle when the target is above the launch point.

By the way he did an input mistake. He said that he will take Vi as 20 m/s but he used 30 m/s instead

Wonderful lecturer that makes physics fun and understandable !!!

Hi prof. Why did you choose the gravity -9.8 since the object rise then falls as it moves with direction of gravity then against it

Great teacher

I wish have a teacher like you Sir

Superb!

so helpful thx a lot

How to solve it without initial velocity?

His skill is mind blowing.

His skill is bind blowing.

this makes so much sense

Very very nice teaching thank you so math ❤

What is that screen he is writing on? How can he writes backwards?

There's something in the equation I don't get... Vfinal=sqrt(Vinitial^2+2gh) >> Vfinal=sqrt(30^2+(9.8)(45)). Why was Vinitial substituted by 30? Wasn't it supposed to be 20 m/s? Thanks for clarifying.

Excellent

sir, you could have solved the problem faster if you divided Vi into Vix and Viy. from Viy you could have solved for time(2Viy/g+kinematic equation for distance) and then plug in the time value to get Vfx (which is the same) and Vfy from one of the kinematic equations . Anyway, your videos are really great .

There is no influence made by an angle that is equal to 30 degrees to the V initial?

Hello Dr, when do we ignore the negative sign of gravity when calculating? I noticed when you substituted the values while getting the square root of Vi^2+2gh that gravity is written as 9.8 and not -9.8. I get that it's so we don't get an error when calculating because it's a square root, but what's the concept behind this? I hope someone answers. TIA!

I calculated the time to be t=1.45 s but negative. Could you clarify how I may have accidentally obtained a negative? Thank you. I used the kinematic equation without acceleration: y=yinitial + 1/2(Vinitial + Vfinal)t

how can i contact you professor? i have a physics problem i'm studying for my final and it's really necessary 😢

How does Vi change from 20m/s to 30m/s??

how can we get the angle of vf?

Благодарю

Im just thinking about it, its 8 years ago and I'm just watching it now

very nice teaching

How does the angle not matter? If I throw the ball down it will hit with a higher velocity then if I throw it up and let it fall down, right?

Where he is writing

Sir please take a look: A projectile is thrown from ground with velocity 8 m/s. When it is moving with 6 m/s, it is at maximum separation from the point of projection corresponding to the speed 6 m/s. Then this maximum separation corresponding to speed 6 m/s is k meter. Find the value of k

At 2:58 how did he take away the 2 that was next to the acceleration from the original kinematic equation

Where are you writing sir I am confused why you take 30 in place of 20 its wrong or not?

the lesson was nicely enjoyed by kelvin kipngetich

i am kiran from pakistan.and sir is there any easy way to leran about projectile motion because its so difficult topic for me to understand ?

Professor Anderson. Thank you for the wonderful lectures. I comprehend them completely but I couldn't completely understand a part of it i.e. why is Vyf the same as Vyi in the example that you gave us to understand the concept. I concur with you for Vxi=Vi=Vxf as there is no specific acceleration provided that we ignore the air resistance but in the y coordinate the object does undergo an acceleration due to gravitational force while moving downwards.

please tell me what your software sir .... tell me

is this formula also applicable in zero launch angle?

Did you ever do a how far it hit the ground?

wow am enjoying the lessons # EJ

would this still work with h=0?

We did this in 11th standard

I'm still trying to rationalise this situation, is he behind the glass and if yes how is he able to write and draw with such pinpoint accuracy?🤐🇿🇦🙆🏽‍♂️

i think under the square root the value of Viy should be Vi cos not 30 squared

🌹

saved my life #considerthisvidliked

I am gonna marry that girl who answered -9.81.

Shut that damn bird up!!!

wait how are you writing backwards what the heck

I guess we could also use energy to solve this questoon (mgh and KE)

i got vf =35.68 m/s and t= 4.2s

Sir can you plz explain v-t,a-t,s-t,a-s V-s graphs

i dont get ittt

vf= 35.81 m/s t=3.23 s i hope im right cuz ive been studying for an exam soon..

man, you are so handsome

initial velocity was 20 not 30

When Vf=√Vi²+2gh why Vi²=30 Because gives angle is 30 tell me Proffesior

There is the biggest mistake that the professor made which Vi is equal 20 and it is not 30

I saw complete video just to know how you write in reverse direction

I don' understand anything

سبوره شفافه والا شنو 😂

Oh god the squeak on that board is irritating.

2:52 sir a planet with a name earth has acceleration due to gravity 9.8m/s^2