Introduction to Newton’s First Law of Motion

Learn about Newton’s First Law of Motion with two examples shown. Plus, I snuck in some free body diagrams and subtle hints at Newton’s Second and Third Laws as well. Thank you so much to Mrs. Zeller for being a Flipping Physics Correspondent!

0:00 Intro
0:08 Newton’s First Law of Motion
0:34 1st Example: Mrs. Zeller presents an object at rest
1:08 What does it mean “No net external force acting on the rock”?
2:20 2nd Example: An object in motion
3:21 What does “constant velocity” mean?
4:00 Also called the Law of Inertia
4:22 The two most common mistakes students make

Next Video:
Introduction to Newton's 2nd Law with Example Problem

Multilingual? Please help translate Flipping Physics videos!
- Los subtítulos de este video de "Flipping Physics" han sido traducidos al Español. Gracias Anwar Delgado Sliva!

Previous Video:
The Reality of our first Free Body Diagram

Attributed to 'English School' (Bonhams) [Public domain], via Wikimedia Commons

[Uncertaintycat]

Had to evacuate Hurricane Matthew, and I am bingewatching Flipping Physics on the way home to study, since I forgot my textbook in the chaos. Thank you for helping me keep up!

[theolympiaacademy]

Flipping Physics - You all deserve a lot more followers and views than you currently have. There has not been one video I've come across that tackled Newton's first law in such a way you did. Thank you so much for the lesson. I subscribed and will donate some money so you can keep this up. Thanks a lot!

[rocks]

Unfortunately, we've been taught in school (since 8th grade) the commonly mistaken version of the First Law. I wonder how many more students had learned the wrong version. Thank you Mr. P for clearing things up!

[iAndroidRICK]

omg! best youtube teacher so far! you should be a real teacher. Seems to come natural to you and you have a gift to explain things simply and eloquently. Great job. your videos help a lot. I wish you had a donation page. I would donate to you for your efforts!

[FlippingPhysics]

Somehow the last of Newton’s Three Laws I provide a video for is the first. Thank you to Mrs. Zeller for being a Flipping Physics correspondent. I do so love having other people in my videos!  #PhysicsED #APPhysics1

[SuvrathHegde]

Hi Sir,  
I request you to upload one of the most confusing concept in Newton's law of motion which is the combination of Friction force, two block problem. In this problem, the two blocks are kept one after another. We take various cases, where in one case where a block in contact with the floor is frictionless and block above that contains a friction. In second case, we consider the block below and above contains friction. In the question can be anything ranging from finding the acceleration of block to finding what  is the friction force on block.

[glich]

I just found out about you guys today. Your videos are great!!

[dah-anluh]

Thank you for the nice video. There are typos in the closed caption. For example, it should be "is either at rest" at 0:31 and "or in motion" at 0:34.

[chowzah]

you put so much effort into these videos. only reason i'm passing physics is you.

[Mech.Masters]

Law of Inertia states that when a object is moving at a uniform velocity, the net force acting on it is zero.
Does it mean that when i am driving my bike with a constant velocity, net force acting on it is zero, How is it moving if there is no force acting on it?
To move a object we need force.
Extremely confused Mr.P, need your help :D

[exe.mdnght]

Am i disabled ? I didn't noticed the students are actually the same person as teacher

[radinelaj]

What about a golf ball in space?
If an astronaut throw a golf ball( or a dice)in space, did it stops floating? Or it will cruise forever/ perpetually?

If the dice stops, it means : the aether exist which causes the friction in space, or the

About Michelson Morley experiment :
Answer : the light is like the water is an exception for some experiments, thus that is unclear experiment.