How to Start Learning Physics and Math from Scratch?

[Neeleshatom]

Summary:: Learning physics

I want to listen physics from scratch. Suggest books and online courses for me.I also want to learn from pre algebra to calculus.Help me.

 

[BvU]

Hello @Neeleshatom , !

Does scratch mean you have to learn reading and writing ? No. What does it mean ? Makes a difference.
Here at PF we value initiative:
Go find a book at the level that suits you and start doing the exercises.
We can't recommend anything if you don't tell us more about whawt you do know

 

[Neeleshatom]

Hello @Neeleshatom , !

Does scratch mean you have to learn reading and writing ? No. What does it mean ? Makes a difference.
Here at PF we value initiative:
Go find a book at the level that suits you and start doing the exercises.
We can't recommend anything if you don't tell us more about whawt you do know

Yes scratch means learning the language of physics.I am learning in 9 th grade.

 

[Neeleshatom]

Hello @Neeleshatom , !

Does scratch mean you have to learn reading and writing ? No. What does it mean ? Makes a difference.
Here at PF we value initiative:
Go find a book at the level that suits you and start doing the exercises.
We can't recommend anything if you don't tell us more about whawt you do know

Just what they teach for kids

 

[BvU]

That helps a bit. My compliments for this curiosity ! (I was like that long ago when there were only books).
And have you outgrown the sites you get when googling physics for kids ?

If so, google college physics books

 

[DrClaude]

Follow @PeroK's advice:

You must have some starting point, especially for the maths. Do you know high-school maths?

Perhaps the first place to look is the Khan academy:

https://www.khanacademy.org/

 

[fresh_42]

Yes scratch means learning the language of physics.I am learning in 9 th grade.

Yes, there is a little disappointment built in here. It is the math.

You must have some starting point, especially for the maths. Do you know high-school maths?

Perhaps the first place to look is the Khan academy:

https://www.khanacademy.org/

It will work to look up mathematical concepts, like e.g. a gradient. But only for a while. You won't miss both, physics and mathematics, if you jump back and forth. So before physics takes place, you will need a basis in mathematics, e.g. trigonometry, differential and integral calculus. However, from scratch also implies a lot of classical results: mechanics, optics, basic electrodynamics and some technical content from engineering. All those can be learned with basic mathematical skills - at least to some extent. What later reads as $\vec{\nabla}\times \vec{E}=-\dfrac{\partial\vec{B}}{\partial t}$ started as $F=I\cdot s \cdot B\cdot \sin \alpha$. What reads as $\dfrac{d}{dt}\dfrac{\partial L}{\partial \dot{q_i}}=0$ started as $\dfrac{\Delta p}{\Delta t} \stackrel{t \to 0}{\longrightarrow} F$. What lurks behind $\ddot{x}+2\delta \dot{x} +\omega^2 x=0$ is in the end simply a sine curve. And what becomes $W=\int F\,ds$ starts with $W=F\cdot s$.

So you don't have to learn all the mathematics first, but at some time you will need to learn it. The easy formulas are only valid in special cases. Nevertheless, you can start with classical physics at high school level. But you cannot start at a certain mathematical or physical point to learn string theory. For that, you need a broad basis. To learn what friction is, you don't.

 

[Neeleshatom]

Yes, there is a little disappointment built in here. It is the math.

It will work to look up mathematical concepts, like e.g. a gradient. But only for a while. You won't miss both, physics and mathematics, if you jump back and forth. So before physics takes place, you will need a basis in mathematics, e.g. trigonometry, differential and integral calculus. However, from scratch also implies a lot of classical results: mechanics, optics, basic electrodynamics and some technical content from engineering. All those can be learned with basic mathematical skills - at least to some extent. What later reads as $\vec{\nabla}\times \vec{E}=-\dfrac{\partial\vec{B}}{\partial t}$ started as $F=I\cdot s \cdot B\cdot \sin \alpha$. What reads as $\dfrac{d}{dt}\dfrac{\partial L}{\partial \dot{q_i}}=0$ started as $\dfrac{\Delta p}{\Delta t} \stackrel{t \to 0}{\longrightarrow} F$. What lurks behind $\ddot{x}+2\delta \dot{x} +\omega^2 x=0$ is in the end simply a sine curve. And what becomes $W=\int F\,ds$ starts with $W=F\cdot s$.

So you don't have to learn all the mathematics first, but at some time you will need to learn it. The easy formulas are only valid in special cases. Nevertheless, you can start with classical physics at high school level. But you cannot start at a certain mathematical or physical point to learn string theory. For that, you need a broad basis. To learn what friction is, you don't.

Suggest some resources please like books

 

[fresh_42]

Suggest some resources please like books

I don't know books in English at this level. I often cite https://openstax.org/subjects because they are free and can help to get started, and to find out what has to be learnt. However, there are better ones. Have you looked into our https://www.physicsforums.com/forums/science-and-math-textbooks.21/ forum?

 

[symbolipoint]

Suggest some resources please like books

Like someone earlier said, "just what they teach the kids", which may mean, depending on how education is structured in your vicinity, learn "college preparatory Mathematics", and follow the series of science courses available there starting in (your current) Ninth grade at your school.

The "scratch" way that you want might not be what you find, but you should understand that the level of detail in education for Mathematics and for Physics improves in the colleges and universities. Also books are great but books are not everything. You will want to observe demonstrations done by your teachers and professors (if you get so far), and you will need to do laboratory exercises.

 

[Neeleshatom]

I don't know books in English at this level. I often cite https://openstax.org/subjects because they are free and can help to get started, and to find out what has to be learnt. However, there are better ones. Have you looked into our https://www.physicsforums.com/forums/science-and-math-textbooks.21/ forum?

I have just got intros in school

 

[fresh_42]

I have just got intros in school

So have a look at the books on the RICE university site. You can download them as pdf and look into it! Just try and find out whether they are o.k. for you, too difficult or too easy. Whatever, it's for free.

 

[Neeleshatom]

So have a look at the books on the RICE university site. You can download them as pdf and look into it! Just try and find out whether they are o.k. for you, too difficult or too easy. Whatever, it's for free.

I have finished kinematics in openstax physics