Kinematics Part 2: Vertical Motion

Alright, we did side to side, now let's go up and down! Kinematics and vertical motion! This is important if you are Wile E. Coyote and you want to drop rocks off of cliffs and know beforehand how long it takes to hit the ground, so you can finally get that pesky roadrunner, who totally did nothing to you, by the way.

Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!

[ProfessorDaveExplains]

You guys! I'm so sorry, I screwed up the equation at 5:30, final velocity should be on the left and initial velocity should be on the right. When written out correctly the arithmetic will work out to the number given, however. Sorry about that!

[theodoresweger]

I like that statement, " we tend to spend most of our time of earth."

[alexanderl]

I'm not even learning this in school right now but I still watch these to learn new things!

[francisgregoryku]

PROFESSOR DAVE MAHH MAYYNN saving me in chem last year and saving me in physics this year

[cja]

bro you are literally so amazing man. Strugglig for the past week on kinematics and now I understand it in less than an hour. Subscribed.

[tochoXK]

4:03 An alternative to using the quadratic formula is calculating how far the rock will go up, then calculating how long it will take to fall from this height to -100m.
Then, the velocity is 0.

(This alternative isn‘t strictly better)

[shariffahpateyahazvi]

its a pity i didnt have you during my high school but am greatfull i have you now in
university where we still take physics and chemistry for our molecular biology and genetics bachelor degree

[ichione]

Professor Dave your'e videos are really informative even our science teacher uses your videos as reference in our whole 4th quarter which is about physics I don't even need my module anymore just your'e videos keep up the outstanding work and hoping for more content in the future. greetings from Tagum City! gikan sa pinakagwapo

[shootandfish]

I agree with the comment of avoiding the quadratic eq by solving in 2 parts. I got 5.1 meters up in 1.02 sec, now v initial = 0 and drop is -105.1 m. my answers agreed with yours to the hundredth. Otherwise, excellent video. Currently tutoring college nephew, it's been over 45 yrs since I had University Physics.

[sahilpatel]

Literally save so much time and gained more knowledge than a whole month of spending of kinematic at my college. WOWW

[daledignos]

You may be my life saver Professor Dave. Yours may be simple but easy to learn as well.
Thanks, hope I do well for my quiz tomorrow.
(Also the Horizontal Motion is part)

I understand the simple mistake on 5:30, but hey mistakes happens. And the answer was still the same when I calculated it.
Thanks.

[DANGERBOY-qzwy]

I'm kinda confused in 2:49 because how did you manage to obtain 4.5s since what I did is (t^2 = 20.4s^2 Don't we just have to square second and time and remove the power so they would be quite equal)??? Since if we didn't square time then it would mean T^2 = 4.5s? which puzzles me.

[ranjeetsohanpal]

I like that you put a comprehension question in the end which helps us to revise the topic we have just learnt from you, Love you Dave, Stay Awesome.😊

[Firnas_]

the cliff is -321.489 m tall🗿
(since it is a cliff the length can not be negative number so that is why it becomes 321.489)

[ianstuder]

Napped for a week and missed everything, watched this at 2am the day before the test, and then proceeded to finish first and get a 100. Luv u dave ❤

[mariiict]

Thank you very much! This made it a lot easier to understand 😄.

[aresemasahilu]

you are the cause to love physics thanks

[Decco]

This is why i love physics
its makes your mathematics classes that seem useless and applies them to the real world, to make it feel like all this effort means something, I think that mathematics and physics should be taught as the same class so that the students have an appreciation for the use case of mathematics. Most students that i know never took physics and only Math, and now hate math because the average person is not creative enough to apply mathematics to the real world. That would mean they would have to make these discoveries themselves, that took geniuses to do.

[AmanSingh-dbnr]

Sir I am a big fan of you, your way of teaching is awesome and so simple that one can easily understand everything😊😊👌👍

[angelicarosales]

Thank you for the information Professor Dave! Very helpful in my science class.