Newton's Second Law of Motion

[MrAircraft999]

thumbs up if you're learning this at school

[lettingmyselfshine]

What are three real life examples for this?

[Maciekkmarosz]

Dear Sir to learn people we need learn too

please see my page maroszVSnewton.cba.pl

I hope You will always use my explanation

speed direction and forces are roped

please help me public my page

[07spider123]

THANK YOU SOOOOO MUCH

[hexihaxi]

En bra video det här Jan!

Hälsningar Klassen.. :)

[Lindgren119]

@hexihaxi jeeefla karl, alltid du din smörapa

[tangredss]

how is newtons 2nd law of motion applied during a 100m sprint?

[MrRamboman123]

so when a boxer hits someone, it has to do with his mass and accaleration?

[hjhrocks]

i have a pi tomorow and i still didnt know what this stuff was, this vid probably brought a potential D to an A, thanks

[berg2046]

3:04. Abnormal people = fat. Great vid :D

[muffinboy101010]

yay! im learning! :D

[mohammadjj]

E=MC² is false :P

[Mrshowstopper99]

only god can pay you for helpin us mate! thanks

[keigerb19]

thank you very much i need this for our homework

[jjjforjjj]

Thanks mate ! you saved my exam

[3597loversefc1878]

fanks dude u helped me with my physics revision ;)

[Moonman2197]

• Its all wrong. Its called laws of Cuck Norris

1) Inertia: Objects will remain at rest or in a uniform motion in a straight line, unless acted upon by Chuck Norris.

2) Force, Mass, Acceleration: The acceleration of an object depends upon Chuck Norris and the magnitude of his force.

3) Action & Reaction: For every action there is an equal or opposite reaction (except with Chuck Norris, there is no such thing as an equal reaction, Chuck Norris is always one step ahead).

[thegreendayfanable]

thanx very much , and if i'm right then

F = ma

=m x v/t

F=momentum/time (momentum = mass x velocity)

[floopsie666]

@thegreendayfanable Not exactly. Its F = m dv/dt not just m v/t so you would have f = d(mv) / dt = dp/dt

[fcdog555]

@floopsie666 wrong, F=dp/dt where p=m0v/sqrt(1-v^2/c^2)

Relativity ftw.

[floopsie666]

@fcdog555 Actually you are wrong because you cannot simply mix newton's second law with the lorentz invariant expression for four - momentum. You have to use F^u = mA^u where A is the four acceleration if you want to use a lorentz - invariant four vector in place of dp/ dt. F = dp / dt is its own entity as it exists in a privileged frame of reference while F^u = mA^u is different and valid in all inertial frames of reference (I didn't say any frame because curvature isn't taken into account).

[gallegosproductions]

why aren't there people like you in the classroom, instead of teachers that don't even explain things that well!!

[tejbzfan]

very helpful

[squirreldomination]

do i actually understand physics. this is awesome cause i can't stay awake in physics.

[SMEXYBXTCH13]

*screams* i just wona kno wut the 2nd law is for my stupid science homework

[vincetheworldly537]

there! now i can report this thing... thankz

[jazzeezz]

Thanks!

[Carlmonterroyo]

nice video thank you

[Carlmonterroyo]

NIce video 

[emmactress1894]

Thank you!

[fhs31053]

thats the acceleration of falling

[ChevailerNoir]

Yet another great video! Thank you!

[dbzmetroidmaster]

Yay!

Now I'll pass my test!

[danglang11]

changing direction is accelerating?? weird...

[Ad1gaJudy7797]

@danglang11

changing direction is acceleration because acceleration is defined as the change in velocity and velocity is the speed AND direction of an object :)

[Hellsslave666]

I always assumed that the metric system is better (im german hehehe, but with mass and weight the english system makes a lot more sense. I knew kg for weight is "wrong", but i didn't knew that lb is "correct"!

Thatks a lot!

[pwnblesnar]

thanks for a great video !

[MadAsAHatterMakeup]

i was able to use this as a referenc eon my science prohect woohoo thanks :)

[avantgardener3]

Really clear. Thanks

[kalpoo7]

ms^-2!!

[sh021149kkk]

Thank you so much for your explanation as I felt so confusing to the third law before that;)

[MarvelsofaLifetime]

"There's still the same amount of Sal on Earth as there is on the moon." Rofl haha

[WannaBeiDev]

you are not suppose to point the arrows at the object (just saying no hating or anything!!)

[vlad7753]

This is soo much more sence then sitting in the class and listening to the teacher -.- Thanks mate!

[crystalidx]

@vlad7753 yeah i was having so much confusion! everyone in my class seem to be kk expect for me.

[SuperShiamak]

@vlad7753 so right

[tuesday2998]

@vlad7753 THIS HAS NOTHING TO DO WITH NEWTONS LAWS ITS A BUNCH OF MATH

[vlad7753]

@tuesday2998 Well, it helped me, so that's what really matters :)

[zball1027]

@tuesday2998 thats what his laws are about? math and physics.

[Skyrodude]

thnx

[accersitusmaximus]

Happy birthday Sir Newton.

[zomgbbqwth]

so if i push 50kg with 100N, it will acc at 2m/s2~ you dint talk abt friction and gravity because it will come to a stop so the 1st law doesnt apply~ :D

yea i know you talk abt the reference and deep space~ i'm just messing with you~ :D

[udeadking45]

is there already a symbol or or equation showing the absence of all forces such as deep space? just a question.

[MrGMauler]

Ignore this: 6:33

[MrGMauler]

And that is why some of Newton's first law don't apply in earth because of the outside or unbalanced forces like gravity, friction, or air resistance. Objects don't accelerate in space!

[Ddra3g]

@MrGMauler Yes they do. Solar Sails. Photons.

[tbirdscience]

@MrGMauler

Objects most certainly do accelerate in space! Acceleration is defined as a change in velocity - and velocity is speed with direction. So...change the speed, you accelerate. Change the direction - you accelerate. So objects (such as the earth) that are orbiting an object (like the sun) are constantly accelerating because they are constantly changing direction.

[Vaylemn]

@MrGMauler You mean objects don't accelerate in a free fall.

[MrGMauler]

So if you push an object in space with 100N it will never speed up, slow down, or change direction(accelerate) because according to Newton's first law an object at rest or motion stays at rest or motion in a straight line unless acted by an outside force. There is no gravity, friction, or air resistance in space so the object will be in motion forever until stopped by an outside force. An example of an outside force is like if someone catches it. Just remember objects don't accelerate in space!

[unknownperson849]

thanks............it really helped me !!!!!:)

[k1773ns]

:o thanks that really helped me with my homework !

---k

[74dorset]

You can give more specific terms of direction. For example you could say 20 degrees North of West.

I hope that clears it up for you, however if you need anymore clarification I would be happy to offer an explanation.

[cookiemonster6142]

i still cant understand why it matters if an object moves to the right or left

could someone please explain

thanks (:

[Nutterbutterz95]

It's really just for the sake of reference. I, for one, should know whether or not a ball is going toward me, or toward the ground. Speed, the scalar, is really unspecific.

[74dorset]

The law he works out if F=MA.

Force = Mass multiplied by acceleration

Force is what is called a vector. A Vector is a unit of magnitude and direction. How fast something is moving and in which direction it is moving in.

As opposed to a vector, a Scalar only requires magnitude. If you just give an acceleration of 3 metres per second squared, that is a scalar.

However if you give 3 metres per second squared to the left, that is a vector.

[Johnjpcoc]

I love the way his teaching!!

My stupied teacher doesn't how to explain!!

She making me so confuse but I love the way he's teaching :D

[AtlantiXYL]

hey man can you explain a video about a bullet's projectile motion.

[jezkikoy003]

it excapes gravity's force according to einstein's E = MC²

[xai07lng]

VECTOR - it is described bÿ both magnitude and direction :) verÿ simple.

for example,

F1= 10 N, to the right.

[moh199702]

WHAT IS A VECTOR I HAVE SEARCHED THE NET AND I STILL CAN'T UNDERSTAND IT can u help explain

[jacksteal4]

he has a video about vectors... im not sure if it is important anymore but he does

[Nutterbutterz95]

It's basically just a magnitude (like speed) in a direction (to the left).

Think of a tornado. A vector that represents a tornado could be something like 500 mph toward someone's house. Obviously a grim example, but I hope it explains.

[conclusionignition]

your way of teaching is great!!you make it so simple!!

[anthonychemistry]

mass- free from gravitational force

weight- with respect to gravitational force

The last part was confusing between mass and weight....But the introduction was really good..moreover, all your videos are really cool..you are helping a lot of people..

Sir Sal..can u make videos on quantum mechanics.i am sure that would be really helpful for us wanting to learn advance physics.....

[Jtking3000]

my last name is newton :-)

[iluvjiyongx3]

F=ma... very useful and cool~ thank u^^

[PhatJoseph]

Even if I fail this test, you have been insightful

[santagotgangbashed]

i left my science book at school.. got a test lesson 1 tomorrow...

saved my ass :) thanks mate

[sn81]

what a great video. I am a physics student and i will say that you got everything right, and that this vid will be quite helpful to many. it doesnt get any more user friendly than that! let's not glorify the english system though by saying it is correct cuz it measures pounds on a scale. the english system is obselete. can we please move on??

[sleepyy]

THIS IS VERY HELPFUL THANK YOU

[pyroincorporated]

lawl click 6:33 over and over lol

[illumantiNWO]

Can anyobody please tell me newtons third law of motion action reaction for the following? there all in relation to high jump.

1.(Run Up) Leaning in , running in J shaped curve

2.(Take Off) Pushing downwards on the ground

3.(In the Air) Rotating trunk forward

4.(Landing) hitting the mats

If anyone knows the answer please tell me I really need the help as my teacher hasnt even explained it to me properly :( im at Tafe and its important

please asap

[daniellebenaim]

YOU ARE REALLY HELPFUL!THANKS :)

[abmars20]

Thank you!

[hieu1994]

Thanx this really cleared things up for me

[polzowatel]

Igor watched this

[ecualovo]

great tutorial!! where is newtons first law

[Myrmidon91]

Proved useful, thanks. :)

[getmewildO2]

we just had a quiz about this one...

it's like.. write the force in dynes and newton..

N = (m/s^2)(kg)

Dynes = (cm/s^2)(g)

heheh.. nothing just want to share...

[hislat]

This is great...thank you very very much...

[darkfighte]

thank you for the vid!