Newton's First Law of Motion Explained in 1 MINUTE

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A concise explanation of Newton's First Law of Motion, which states that an object in motion will stay in motion until acted on by a resultant force.

The above is how Newton's First Law of Motion is most commonly described. But is it really the best definition?

Well, not really. A better way to describe the Law would be to say "an object continues to travel at a constant velocity until acted on by a resultant (or net) force". This way, we account for the fact that the object in question may be already moving at a constant speed, or it may be stationary. The key idea is that if there is no NET force on the object, it travels at a constant speed (or remains stationary). As soon as there is a net force on it, it accelerates. In the video you can also find a couple of useful examples, to hopefully help clarify things a bit.

I also tried to explain the key concepts whilst limiting myself to 1 minute. I think I'm going to make lots more videos where I try and explain Physics concepts in 1 minute, so leave me any suggestions in the comments below. If you have any questions, then do feel free to leave them down below also. The next video will be Newton's SECOND Law of Motion Explained in 1 minute.

Oh yeah, what do you guys think of the new logo?

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Physics school: *Takes entire weeks to explain Net Force*

This madlad:

theboringprogrammer

What an excellent video! Concise, clear and really easy to follow.

orlandodabner

Hey this is damn cool!
Fermat's principle of least time is a nice choice I think.
Then, maybe, vectors and tensors?

TejasKdB

Nicely done Parth. Keep up the good work. It was very helpful.

hossaintanha

Simply,
A body continues to be in its state of motion, or of rest until it is compelled by an external force to change its state.

shriyansreddyyendreddy

I just like how your outro is almost as long as the explaination

adavirus

Hi,

can you eventually explain why the kinetic energy of an object (=1/2 mv²) increases with the square of its speed ? If I spent 1 joule in space to accelerate by 1 m/sec, why would the third time for example require more energy for the same acceleration than the first thrust ?

En_theo

Please upload a video on Vandar Waals Equation of Real Gas

sathiroy

Nice one, Parth. Just a quick q. I thought there was always gravity, everywhere, no matter how far away from anything one is. It’s the binding force of the entire universe isn’t it? It might only be a very small force, but it’s there and we’ll eventually fall into or bump into something. But I don’t want to rain on your parade, man. You’re doing sterling work. Newtonian physics is always fun. Speed of sound next, please. Good excuse to visit Cambridge and redo experiment. Keep it up (or down - or moving at a constant velocity somewhere).

ericrb

Hi Parth, I was wondering what are the requirements (tests, assessments) e.t.c for getting into physics at Cambridge, and is it different for international students?

atr

Can you explain plank's constant?

mauleshvala

Just as I thought I couldn’t love physics more

bvsqdyw

Sir please make a vedio of relativity, each and everything about relativity including formulas.

AllInOne-nzkg

Ok, explain in one minute how a beam of light that is one light year long (just saying) behaves when the light source begins to rotate. If the source rotated 1 degree in one second, does it take one second for the beam to reach it’s destination one light year away? The answer should be obvious, but it should be fun to see how the beam appears to “bend” as the source is rotated. Maybe a good way to demonstrate this is to shoot particles at one-tenth of a second intervals. Have fun!

jcinaz