**4.192 forces questions.**

Is there an answer to the question why there are only four fundamental interactions of nature?

From "Centrifugal force", Wikipedia:
Acceleration
[...]
By applying the transformation above from the stationary to the rotating frame three times the absolute acceleration of the ...

The capstan equation will give me the relation between the tension force at both sides of a rope wrapped around a cylindrical object, but what happens in this situation where the 'rope' is something ...

As I was trying to find an answer to another problem, I was informed that the equation I was using would not work.
The equation I was using was
$$F = (NI)^2\mu_0\frac{\text{Area}}{2g^2}$$
If this ...

I am currently working on a project involving solenoids, and I needed a force(Newtons, not a measure of magnetic field strength) equation. What I came up with after some digging around on the internet,...

So my physics class is going over Energy and force and we had to solve a problem where we found acceleration with only force and mass how do we do that

A question that came into my mind: Given that an object is being released with zero initial velocity in some hight H relatively to an arbitrary surface, it’s falling with an influence of a ...

Let's say we have a meter stick with a single rope attached to it. One end of the rope is attached to one end of the meter stick, the other end of the rope is attached to the opposite end of the meter ...

Suppose I push a book with my hand. I am applying force on it in the process. My question is: What is the carrier of the force I am applying?

I have the following question:
I noticed that if I solve for the acceleration assuming that the acceleration is occuring to the left, I get the equation:
$\displaystyle a = \frac{m_3g-\mu_km_1gcos\...

I will make a generalized form of my question.
There are two point charges $q$, $x$ distance apart.
And there is a dielectric slab of thickness $t$ and of dielectric constant $K$.
Should the force ...

I am trying to model a mass being driven by a motor (Angular acceleration $\dot{\omega}$ and shaft-polar modulus $J$) with belts and pulleys. This is then being compared to numerical simulations. I ...

Why should string apply a force on pulley? (like atwood machine cases) and does that mean the pulley will exert an equal force on string (newton's third law)?
Please explain in detail,if possible ...

The two masses m1 and m2 are joined by a spring as shown. The system is dropped to the ground from a height. The spring will be:
(a) neither compressed nor stretched regardless of the value of m1 and ...

May I ask for anyone’s assistance with some igcse questions? I need the answers urgently due to an exam coming up.

Newton's first law states that a body will remain at rest or in motion until an external force is applied on it.
Now consider a dog sleeping in a room and after some time it suddenly woke up and ...

In: http://www.ifi.unicamp.br/~assis/J-Advanced-Phys-V5-p176-179(2016).pdf equation (5) Weber's gravitational law is given by (assuming zero acceleration):
$F = - G m_1 m_2 \frac{\hat{r}_{12}}{r_{12}^...

I found that tension is an electromagnetic force. I suspect the cause is that it's due to the cohesion of elements of the wire which is due to dipolar attraction of wire which is due an electric field....

In my textbook, the definition of tension was given that Tension is the reactive force which exists when string is being stretched at its both end. After it there was a case given that to calculate ...

This is a question from a physics book that I can't get my head around.
While moving in, a new homeowner is pushing a box across the floor at a constant velocity. The coefficient of kinetic friction ...

Is there a reaction pair for $mg \sin \theta$ on a inclined plane?
It is there for the normal force on a block on a flat plane, so is it there for $mg \sin \theta$ also?

Suppose two conductive plates placed parallel to each other acting as a capacitor. When a static electric field is applied to them, direction vertical to the plates, will this two plates attract each ...

Suppose I push a wall. The wall does not move, so the work done is zero.
But, if I were powered by a battery, then the battery would eventually die, that means I am spending energy.
How does it make ...

could you please help me understand this problem I've been trying to understand?
So I'm confused as to why the static friction acts leftwards from the block on the cylinder as opposed to rightward.
...

I'm asking about a real experiment. As in this I have read in an answer in this site which is What atomic forces are acting to resist me pushing an air filled bottle underwater?. As in ben51's answer ...

Does a contact force exist between two bodies in contact with each other provided that they're only in contact with each other even if they're still and no external force acts upon the system of two ...

In this example 7.6 from the book "Classical Dynamics of Particles and Systems 5th Edition by Thornton and Marion"
"Find the frequency of small oscillations of a simple pendulum placed in a railroad ...

When we walk, we apply a force $F$ on the earth at an angle $\theta$ .
Thus, by Newton's third law,
$$ F_{\text{me, earth}}=-F_{\text{earth,me}}$$
Therefore, the earth exerts a reaction force on us, ...

In all the physics I know forces are always between pairs of things. Gravity is between pairs of masses, so is electrostatic repulsion, so are the strong and weak forces as far as I understand them (...

When a gravitational force acts on a body, can the body be split up into smaller units each with part of the force acting through its COM? Will the line of action calculated differ from the sum of the ...

We're all familiar with tensions in all kinds of materials: elastics or rubber bands, ropes, or variations of them. And we also know what causes them.
But when we want explain the tension in (super)...

I'm learning Lagrangian mechanics, and more than a few times you find expressions of the form
$$-\frac{\partial{Z}}{\partial{q_j}} + \frac{\mathrm d}{\mathrm dt}\left(\frac{\partial{Z}}{\partial{\dot{...

a man rolls 100kg up a ramp of length 4.4 m into a truck at a height 2.2 m. what is the work done by the man and work done against gravity
Solution:
Work done= force X displacement
...

If you leave a sailing yacht (no sails set, motor off, rudder centered) all to itself it will eventually align with the direction of the wind. The stern will point to where the wind is coming from and ...

A metal sphere of radius $R$ carries a total charge $Q$. What is the force of repulsion between the northern hemisphere and southern hemisphere?
In this problem you consider the force per unit area ...

Consider the following case of a drum unrolling a mass that is on a massless string wrapped around the drum:
According to my professor, here we must consider the mass $m$ being in a gravitational ...

Yes air is less dense than water but how does the bottle know to rise or indeed to move? It's not electromagnetism I think. Does this have a relation to gravitational forces? Is it to do with the ...

I know that work, $$ W = \int \vec F \cdot d\vec x$$ is zero if $\vec F \perp \vec x$. This means that if I tried pushing a book directly into the table, I do zero work on the book. Can the same be ...

A $1500$ kg cable car moves vertically by means of a cable that connects the ground and the top of the hill. What is the tension in the supporting (massless) cable when the cab, originally moving ...

Could you give me a hint please? I have tried to take a moment but I didn't know what to do next.

I am reading this paper that models the equation of motion of a group of ducks (surf scoters) as observed in Vancouver. The full paper and supplementary information can be downloaded here:
http://...

I'm trying to find a simple formula (if there is one) for calculating how much weight is needed to hold up an offset weight as shown in the image. I'd like to know, in theory, how much weight is ...

I have been studying electromagnetic induction. As I understand, a magnetic field will exert a force on a moving charge. What I would like to know is whether a changing magnetic field will exert a ...

Elasticity is one the most intriguing phenomena, wiki gives a summary explanation of what happens in a steel spring:
the atomic lattice changes size and shape when forces are applied
(energy is ...

This is a diagram of a tension lever. Tension exerted by this tool only depends on where you hang a mass.
Suppose that the gravitational force of a mass is Mg.
If you hang it at 1(in the diagram), T ...

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