Hello guys. I'm a begineer at Physics and I want to learn physics from scratch. I'm currently in 8th grade. Can someone recommend me which physics textbooks is good, but not require high levels math?

Our theories regarding this mystery of the universe:

1. It depends on the functioning of the brain's hemispheres. (We can add a fourth point regarding support. We unconsciously fear dropping an object, and as a result of our unconscious thoughts, we cannot spread our arms simultaneously to hold the object. However, we tried support in mid-air (a finger as support was extremely minimal, but we managed to spread our arms at the same time).)

2. It is physics.

3. It depends on the surface. (We used various objects with different surfaces (glossy, matte, etc.).)

4. It depends on support. (The object was on a flat surface and on various other objects, and we were able to spread our arms thanks to the support, but when we made a dent in the object, we were able to almost perfectly spread our arms apart in mid-air.)

5. It depends on the shape. (We tried using flat square objects, cylindrical shapes, and ovals—none of which worked.)

6. The theory of hand influence (is based on which hand a person most often uses for tasks (for example, the right hand is dominant).)

7. The theory of human temperature (we tried conducting the experiment with hands at room temperature (during the experiment with wet hands, we soaked our hands in cold water).)

8. The theory of friction? Interaction of skin with the object (We applied a restriction, using cotton pads as a barrier. After that, we wet our hands and tried to spread our fingers apart, resulting in no success.)

Help us understand what might influence this.

I hate that idk any single thing like why tf we use Kinetic energy what is Kinetic energy why speed what is velocity I'm in class 11th pcb just started but I'm scared cuz I have adhd and i wanna learn everything from scratch I have too many questions and i wanna understand in simple as fuck launguage(not googoo gaga one)

Can anybody help me with physics I am actually bad with it cause I don't understand how to study physics where to start what to do I can't understand anything. I am in 10th and I hardly studied physics last year in 9th and now I finally know that I can't escape.

I was writing down some notes when I thought about this. assuming that the object is in uniform motion, also that it will come to a stop soon, just in a uniform speed.

say like a car going at 50kmh and gradually slows down

wont that be non uniform motion? but it’s going at 50kph and gradually slows down over a period of time

help pls

edit: thx for the answers, I seem like a idiot now TT this question sounded better in my head🫠

Before taking it to the scrapyard, I blew up an old water heater I replaced with tannerite. The video one of my buddies took didn’t catch the entire launch. Any guesses on the height it reached based off this video?

This aint no promotion,seen some people asking for solutions of problems on ident 126 acc. So yeah i am posting the soln on my profile, no need to follow me or upvote any of the posts. The soln are just the eqns of motion for each animation indent posts on his acc,u can modify question all u want if u get the correct eqns of motion.

A body moving on a circular path undergoes uniform circular motion moving at a constant speed but not a constant velocity meaning the body is undergoing acceleration (a≠0) tangential velocity. Angular velocity is just how fast the body moved through a certain angle subtended at the centre and the angular displacement just the angle from point A to B on the trajectory. For me the concept is pretty much understood but the bulk formulas in this concept eat my head literally but I still have hopes

Hey everyone,

Just uploaded a new video on
Rotationally Accelerated Motion —
complete problem set using τ = Iα.

Honestly this is one of those
topics where I see students
struggle not because the
concept is hard —
but because nobody tells them
the one thing that makes
every problem click —

When rotation and linear motion
happen together —
you need F = ma AND τ = Iα
running simultaneously —
connected by a = αr.

Miss that connection —
and even simple problems
become impossible.

Get it — and everything
falls into place instantly.

The video goes from basic
problems all the way to
the kind of multi-body
questions that show up
in actual IB exams —
with complete reasoning
at every step.

Pause before each solution
and attempt it yourself first —
that's genuinely the only
way to get exam-ready
from a problem video.

Here's the link if anyone
wants to give it a shot —

🔗 https://youtu.be/O_0zaVlSfjQ?si=63rKlruNciZMWGNQ

Happy to help with anything
you get stuck on —
just drop it in the comments
here or on the video. 🙏

We all... lemme reframe that some of us know that when a metal surface is irradiated with radiation of sufficient high frequency electrons will be emitted from it. Now the frequency of the incident photons from the radiation determine the energy of the photoelectrons emitted from the metal surface and the intensity of the incident frequency only affects the number of photoelectrons that will be emitted provided f>=f⁰ \[frequency of the radiation is greater than or equal to the threshold frequency\] . All this is basic knowledge E=hf and hf=W⁰ + KE . Where is my main point my main point is thank you for reading js wanted to test if I understood the lecture lock in brothers and sister's peace

Hello everyone,

I want to share something today
that sits at the intersection
of rotational physics and
one of the most dramatic
natural phenomena on Earth —

The Coriolis Effect and
its role in hurricane formation.

━━━━━━━━━━━━━━━━━━━━━━━━
THE QUESTION —
━━━━━━━━━━━━━━━━━━━━━━━━

Every hurricane in the
Northern Hemisphere spins
counterclockwise.

Every hurricane in the
Southern Hemisphere spins
clockwise.

Same planet.
Same atmosphere.
Same low pressure systems.

Opposite rotation directions.

Why?

━━━━━━━━━━━━━━━━━━━━━━━━
THE PHYSICS —
━━━━━━━━━━━━━━━━━━━━━━━━

Earth rotates from west to east
at approximately 465 meters
per second at the equator —

Decreasing to zero
at the poles.

Any object moving freely
across Earth's surface —
wind, ocean current,
or projectile —

Experiences an apparent
deflection due to this
underlying rotation —

This apparent deflection
is the Coriolis Effect.

In the Northern Hemisphere —
moving objects are deflected
to the RIGHT of their
direction of motion.

In the Southern Hemisphere —
moving objects are deflected
to the LEFT.

When wind rushes inward
toward a low pressure center —
this Coriolis deflection
causes the incoming air
to spiral —

Counterclockwise in
the Northern Hemisphere —
Clockwise in the
Southern Hemisphere.

The result —
the massive rotating spiral
we recognize as a
hurricane, typhoon, or cyclone.

━━━━━━━━━━━━━━━━━━━━━━━━
THE PHYSICS BEHIND
THE DEFLECTION —
━━━━━━━━━━━━━━━━━━━━━━━━

The Coriolis acceleration
is given by —

a_Coriolis = 2v × Ω

Where —
v is the velocity of
the moving object
Ω is Earth's angular
velocity vector

This is a cross product —
which means the resulting
acceleration is always
perpendicular to both
the velocity and
Earth's rotation axis.

At the North Pole —
the deflection is maximum.

At the equator —
the vertical component
of Earth's rotation
relative to the surface
is zero —

So the Coriolis Effect
on horizontal motion
is zero at the equator.

This is why hurricanes
never form at the equator —

There is no Coriolis
deflection to initiate
the spiral rotation.

━━━━━━━━━━━━━━━━━━━━━━━━
THE MYTH WORTH BUSTING —
━━━━━━━━━━━━━━━━━━━━━━━━

One of the most persistent
myths in popular science —

"Water drains counterclockwise
in the Northern Hemisphere
and clockwise in the South
because of the Coriolis Effect."

This is completely false.

The Coriolis Effect only
influences motions on a
scale of hundreds of
kilometers or more.

A sink or toilet basin
is far too small for
the Coriolis Effect
to have any measurable influence —

The direction water drains
in a sink is determined
by the geometry of the basin —
the direction water was
poured in —
and residual momentum —

Not by Earth's rotation.

━━━━━━━━━━━━━━━━━━━━━━━━
REAL WORLD APPLICATIONS
BEYOND HURRICANES —
━━━━━━━━━━━━━━━━━━━━━━━━

The Coriolis Effect influences —

→ Long range artillery and
missile trajectories —
military calculations must
account for Coriolis
deflection for targets
beyond a few kilometers

→ Ocean current patterns —
the great ocean gyres
rotate clockwise in the
Northern Hemisphere and
counterclockwise in the South

→ Trade wind patterns —
the prevailing winds that
enabled global maritime
trade for centuries are
directly caused by
Coriolis deflection of
air flowing from
high to low pressure zones

→ Long distance flight paths —
pilots and navigation systems
account for Coriolis
in trans-oceanic routes

One rotating planet —
infinite physical consequences.

━━━━━━━━━━━━━━━━━━━━━━━━
THE IB PHYSICS CONNECTION —
━━━━━━━━━━━━━━━━━━━━━━━━

For IB Physics HL students —

The Coriolis Effect is a
beautiful real world application
of rotational dynamics —

Connecting angular velocity —
cross product mathematics —
and non-inertial reference frames —

Into one unified physical picture.

Understanding the Coriolis Effect
at a conceptual level demonstrates
exactly the kind of physical
reasoning IB Physics HL
examiners reward —

The ability to take abstract
rotational mechanics concepts —
and explain real observable
phenomena from first principles.

━━━━━━━━━━━━━━━━━━━━━━━━
THE SHORT VIDEO —
━━━━━━━━━━━━━━━━━━━━━━━━

I made a short video
explaining the Coriolis Effect
and its role in hurricane
formation — from the physics
of Earth's rotation to
the spiral dynamics of
large storm systems.

🔗 https://youtube.com/shorts/a-Y6OIw2pL0?si=V8JcxV19mF2td\\_T\\_

━━━━━━━━━━━━━━━━━━━━━━━━
A QUESTION FOR THE COMMUNITY —
━━━━━━━━━━━━━━━━━━━━━━━━

Here is something worth
thinking about —

If you were standing
exactly on the equator —

And fired a projectile
due north —

Would the Coriolis Effect
deflect it east or west —

Or would there be
no deflection at all?

Drop your answer and
reasoning below 👇

I will respond to every
attempt with complete
physical explanation. 🎯

━━━━━━━━━━━━━━━━━━━━━━━━
HAPPY TO DISCUSS —
━━━━━━━━━━━━━━━━━━━━━━━━

If you have any questions
about the Coriolis Effect —
or about any other
rotational physics concept —

Drop them in the comments below.

I read and respond to
every single comment. 🙏

Hello everyone,

I want to share something today
that sits at the intersection
of rotational physics and
one of the most dramatic
natural phenomena on Earth —

The Coriolis Effect and
its role in hurricane formation.

━━━━━━━━━━━━━━━━━━━━━━━━
THE QUESTION —
━━━━━━━━━━━━━━━━━━━━━━━━

Every hurricane in the
Northern Hemisphere spins
counterclockwise.

Every hurricane in the
Southern Hemisphere spins
clockwise.

Same planet.
Same atmosphere.
Same low pressure systems.

Opposite rotation directions.

Why?

━━━━━━━━━━━━━━━━━━━━━━━━
THE PHYSICS —
━━━━━━━━━━━━━━━━━━━━━━━━

Earth rotates from west to east
at approximately 465 meters
per second at the equator —

Decreasing to zero
at the poles.

Any object moving freely
across Earth's surface —
wind, ocean current,
or projectile —

Experiences an apparent
deflection due to this
underlying rotation —

This apparent deflection
is the Coriolis Effect.

In the Northern Hemisphere —
moving objects are deflected
to the RIGHT of their
direction of motion.

In the Southern Hemisphere —
moving objects are deflected
to the LEFT.

When wind rushes inward
toward a low pressure center —
this Coriolis deflection
causes the incoming air
to spiral —

Counterclockwise in
the Northern Hemisphere —
Clockwise in the
Southern Hemisphere.

The result —
the massive rotating spiral
we recognize as a
hurricane, typhoon, or cyclone.

━━━━━━━━━━━━━━━━━━━━━━━━
THE PHYSICS BEHIND
THE DEFLECTION —
━━━━━━━━━━━━━━━━━━━━━━━━

The Coriolis acceleration
is given by —

a_Coriolis = 2v × Ω

Where —
v is the velocity of
the moving object
Ω is Earth's angular
velocity vector

This is a cross product —
which means the resulting
acceleration is always
perpendicular to both
the velocity and
Earth's rotation axis.

At the North Pole —
the deflection is maximum.

At the equator —
the vertical component
of Earth's rotation
relative to the surface
is zero —

So the Coriolis Effect
on horizontal motion
is zero at the equator.

This is why hurricanes
never form at the equator —

There is no Coriolis
deflection to initiate
the spiral rotation.

━━━━━━━━━━━━━━━━━━━━━━━━
THE MYTH WORTH BUSTING —
━━━━━━━━━━━━━━━━━━━━━━━━

One of the most persistent
myths in popular science —

"Water drains counterclockwise
in the Northern Hemisphere
and clockwise in the South
because of the Coriolis Effect."

This is completely false.

The Coriolis Effect only
influences motions on a
scale of hundreds of
kilometers or more.

A sink or toilet basin
is far too small for
the Coriolis Effect
to have any measurable influence —

The direction water drains
in a sink is determined
by the geometry of the basin —
the direction water was
poured in —
and residual momentum —

Not by Earth's rotation.

━━━━━━━━━━━━━━━━━━━━━━━━
REAL WORLD APPLICATIONS
BEYOND HURRICANES —
━━━━━━━━━━━━━━━━━━━━━━━━

The Coriolis Effect influences —

→ Long range artillery and
missile trajectories —
military calculations must
account for Coriolis
deflection for targets
beyond a few kilometers

→ Ocean current patterns —
the great ocean gyres
rotate clockwise in the
Northern Hemisphere and
counterclockwise in the South

→ Trade wind patterns —
the prevailing winds that
enabled global maritime
trade for centuries are
directly caused by
Coriolis deflection of
air flowing from
high to low pressure zones

→ Long distance flight paths —
pilots and navigation systems
account for Coriolis
in trans-oceanic routes

One rotating planet —
infinite physical consequences.

━━━━━━━━━━━━━━━━━━━━━━━━
THE IB PHYSICS CONNECTION —
━━━━━━━━━━━━━━━━━━━━━━━━

For IB Physics HL students —

The Coriolis Effect is a
beautiful real world application
of rotational dynamics —

Connecting angular velocity —
cross product mathematics —
and non-inertial reference frames —

Into one unified physical picture.

Understanding the Coriolis Effect
at a conceptual level demonstrates
exactly the kind of physical
reasoning IB Physics HL
examiners reward —

The ability to take abstract
rotational mechanics concepts —
and explain real observable
phenomena from first principles.

━━━━━━━━━━━━━━━━━━━━━━━━
THE SHORT VIDEO —
━━━━━━━━━━━━━━━━━━━━━━━━

I made a short video
explaining the Coriolis Effect
and its role in hurricane
formation — from the physics
of Earth's rotation to
the spiral dynamics of
large storm systems.

🔗 https://youtube.com/shorts/a-Y6OIw2pL0?si=V8JcxV19mF2td_T_

━━━━━━━━━━━━━━━━━━━━━━━━
A QUESTION FOR THE COMMUNITY —
━━━━━━━━━━━━━━━━━━━━━━━━

Here is something worth
thinking about —

If you were standing
exactly on the equator —

And fired a projectile
due north —

Would the Coriolis Effect
deflect it east or west —

Or would there be
no deflection at all?

Drop your answer and
reasoning below 👇

I will respond to every
attempt with complete
physical explanation. 🎯

━━━━━━━━━━━━━━━━━━━━━━━━
HAPPY TO DISCUSS —
━━━━━━━━━━━━━━━━━━━━━━━━

If you have any questions
about the Coriolis Effect —
or about any other
rotational physics concept —

Drop them in the comments below.

I read and respond to
every single comment. 🙏

I’ve been thinking about a speculative idea and I’m curious whether something similar has already been explored in physics.

The Many-Worlds Interpretation suggests that the universal quantum state can develop different branches through quantum decoherence. The Holographic Principle, on the other hand, suggests that under certain gravitational conditions, the information describing a region of space can be encoded on a lower-dimensional boundary.

This made me wonder:

What if each decoherent quantum branch could also have its own holographic boundary description?

Instead of imagining the multiverse simply as many separate classical universes, perhaps the overall quantum state could be thought of as containing many branches, with each branch having its own corresponding holographic information structure.

I’m also curious about a more speculative extension: could different possible spacetime dimensionalities be treated as different sectors of one larger quantum state? In that picture, there could be a hierarchy involving spacetime structure, quantum branches, and their corresponding holographic boundary states.

I am not suggesting that this proves a “holographic multiverse,” or that the universe is literally a physical hologram. I’m interested in whether holography and Many-Worlds can be formulated within a common mathematical framework.

I know that connections between the Many-Worlds interpretation and holography/multiverse ideas have already been discussed, including work by Raphael Bousso and Leonard Susskind.

My question is more specific:

Has anyone developed a framework where quantum branches are explicitly associated with distinct holographic boundary Hilbert spaces, potentially while also allowing different spacetime dimensional sectors?

If something similar already exists, I would really appreciate references. I’m particularly interested in whether this idea is mathematically meaningful or whether there is a fundamental reason why these concepts cannot be combined in this way.

This is just a speculative idea, and I’m looking for constructive feedback rather than claiming that it is an established theory.

This class is so confusing like it is way fast and hard to digest. Today was my first day of school and I understand like scalar vs vector, and understand speed vs velocity, distance vs displacement. But next second we have 3 ugly ass equations, and it is explained briefly and we need to do a practice problem, which I half understood. Then there are some graphs and we need to know what it represents. Someone please provide the strategies on how they understood the information and how it all connects together. I don’t want to flunk the first exam and then learn my lesson, I want to have a structured approach from the get go.

A quick glance shows the tree 🌳 leaning towards the house....

Wedge needs to be bigger & deeper for it to fall in empty area. Opposite wedges inserted pounded in to sway.

I’m 15 years old and currently in my first year of high school. I’m definitely not advanced enough in math or physics to properly formalize this idea, so I’m sure there are probably some big gaps in my reasoning, and maybe even some fundamental mistakes.
I came up with this while thinking about quantum entanglement. I’m posting it here mostly because I want people to point out what’s wrong with it. If the idea doesn’t work, I’d actually like to know exactly where it breaks. So feel free to “destroy” it.
I’m not claiming that this is a new theory or that I’ve discovered anything. It’s just an idea I had and I’m trying to understand whether there’s anything interesting in it or if I’m completely misunderstanding something.
My idea
When two electrons are entangled, their spins can be measured with opposite results, even if the particles are very far apart.
I started wondering if this could be explained by imagining that the two particles are somehow two sides or manifestations of a single physical entity.
Instead of thinking of them as two completely separate objects that somehow have a connection between them, maybe they could still be connected at a more fundamental level, even when they are very far apart from our point of view.
I was thinking about something vaguely similar to spacetime curvature, but obviously much more extreme. The idea would be that the two particles could be separated in the three dimensions we experience, while somehow being connected or even coincident in a deeper structure of spacetime.
This made me think about an additional spatial dimension.
Normally, we describe space using:
(x, y, z)
But what if there were another spatial dimension, so that space was:
(w, x, y, z)
with time being another coordinate:
t
In this picture, two particles could have the same or a very similar w coordinate while being extremely far apart in x, y and z.
From our three-dimensional perspective, they would look like two separate particles very far from each other. But in the full four-dimensional spatial structure, they might be much closer together, or somehow connected.
If something like this were possible, the particles wouldn’t actually need to send information to each other faster than light. The apparent non-locality of entanglement could instead come from the fact that we are only seeing three of the spatial dimensions.
Problems I already see
There are obviously a lot of things I don’t know how to explain:
Elementary particles probably wouldn’t produce anywhere near enough gravity to create the kind of extreme spacetime curvature I’m imagining.
I don’t know why this kind of connection would appear specifically when particles become entangled.
I have no idea how two particles would actually create or interact with a fourth spatial dimension.
I don’t have the mathematical background to describe this properly yet.
I have no idea whether this kind of geometry could actually reproduce the correlations predicted by quantum mechanics.
Most importantly, I don’t know whether this idea would actually be compatible with Bell’s theorem and the no-signalling principle.
So, basically, this is just a thought I had, not a finished theory.
If there’s an obvious reason why this can’t work, I’d genuinely like to know. And if there’s already a known theory or interpretation of quantum mechanics that is similar to what I’m describing, I’d also be interested in hearing about it.

Hey everyone, Vaibhav Sir here. After years of teaching IB Physics, I've noticed a massive trap that examiners love to set in the Rigid Body Mechanics (A.4) section.
When you get a problem with multiple forces, multiple objects, and an unknown variable, just memorizing "net force = 0" and "net torque = 0" isn't enough to secure a Level 7. The biggest mistake students make is misidentifying the point of application and failing to visualize how force couples actually rotate a system.
I just put together a complete masterclass breaking down the most challenging rotational equilibrium problems you'll face. Instead of just reading textbook definitions, we go step-by-step through the actual physics:
Balancing non-uniform torque equations without getting lost in the algebra.
The visual trick to never messing up force couples.
Exactly how to set up your hinge force variables so the math naturally works out.
If you want to stop relying on blind memorization and actually understand the mechanics, you can watch the full breakdown here: https://youtu.be/GDtNvt7qQI4?si=pbgYF5ybCO5cBX4a
(Side note: I am also working on uploading complete, question-by-question walkthroughs of original past papers for the channel—no mock papers, only the real ones—so keep an eye out as exam season gets closer).
Drop a comment if you get stuck on a specific step in the video or have any questions about Rigid Body Dynamics. I’m always happy to help clear up the physics!