Movement Definition and 636 Threads

...but is it correct to say: Speed² (in space) + Time² (in space) = 1 ?? derived using Pythagorus (explained at 10-13 minutes in)....the trade off between Speed and Time, at maximum speed Time is zero and at max Time, Speed would be zero.

Hi I’m new to this site as well as physics. But it fascinates me. Is time the creation of movement?

Lets just say for the sake of argument that the earth, sun, solar system, galaxy were all moving due north at 1,000,000 miles an hour. If you were to travel due south at 1,000,000 mph you would basically be not moving at all. How would this affect time for you or anyone observing you?

When you are doing certain movements in martial arts like kicking, you bring your arms up in order to balance yourself. Bringing your arms upwards also moves the center of mass (COM) upwards but if the COM is higher than the position should be less stable and not more stable. How do you explain...

Electric field is present . The net movement of electrons would flow in direction opposite to the electric field yes.But if we were to take a small cross section of the conductor and say 3 electrons are moving in slightly different directions would that not mean that it has 3 components to the...

This is from Feynman's lectures: https://www.feynmanlectures.caltech.edu/II_26.html Should the (b) say F1=q1E2 and F2=q2E1?

Is there any friction coefficient in the sea as there is in ground? I've tried searching but I see results between 0.4 and 25.7 (?). If there's no such thing as a coefficient of friction to water, how do I calculate the amount of force to start moving a X mass object in water?

A wave pulse moves along a stretched rope in the direction shown. Which diagram shows the variation with time t of the displacement s of the particle P in the rope? A B C D my answer was c because i thought that the particle would move in the same way the wave was coming...

I have tried doing W=-1/2*m*vi^2 and total work = W + friction work

When water is moving does the actual freezing temperature change or does steam etc not freeze because warmer water keeps getting brought to the surface? Or is there something else going on that lowers the freezing point as long as the water is in motion? There are several reasons for my...

The fact that a photon moves only through space (this is what I have read, it can be wrong), not time is said to be the reason why it has so long lifespan, much longer than the calculated lifespan of the universe. Is this wrong? if so, please explain why.

i have this linkage as far as happening that This Link make angle between x-y axis and rotate also between x-y axis , meanwhilel yaw( z-axis) am i right ? please make it clear

How is it possible that Earth's rotation doesn't affect our relative velocity? In other words, if I walk in the opposite direction of Earth's rotation, shouldn't I reach destinations faster than if I walk in the same direction? Sorry if the terms are not that accurate, I’m an architect!

I know that the Heisenberg Uncertainty principle states that the position of an electron is uncertain, however, if an electron is created due to beta decay, then at what location is it more likely to begin its movement? Is it right inside the proton? Is it the outer edge of the proton? Is it...

From the picture, the particle experiences upwards force. But how to determine the direction of motion? I think there are two possibilities: if the particle is positive, it moves from Q to P and if it is negative it moves from P to Q. Thanks

Hello, I want to model the thermal behaviour of a moving heat transfer fluid in 1D, with convective exchanges with the walls. I have obtained the following equation (1 on the figure). I have performed a second order spatial discretization with decentred schemes at the extremities (y = 0 and H)...

v=1.00*8=>v=8 rad/s ar=>100*8^2=>ar=64 rad/s^2 at=1.00*4=>at=4 rad/s^2 The only question I have is ar=-64 rad/s^2, not 64 rad/s^2 as I calculated. I believe this is because the wheel is accelerating in a clockwise direction. However this is not indicated by the mathematical equation. How do I...

What would happen if the protons started to have orbital movements with energy gain and loss, changing orbital bands, at the same time as the electrons?

Nikola Tesla, the prominent 20th century inventor, stated in his book "My Inventions" that all human movements appear to come from the will but are are actually generated from the outside. He goes on to say that this phenomenon is of incalculable vale to the human race and he urged further study...

Can someone guide me how can I find time ?! I don't have any idea. This is a part of a question in Classical Dynamics.

Imagine two electro-magnets about a metre apart aimed at each other. We turn one of them on, and are able to watch the magnetism propagate in slow motion. The moment the magnetism reaches the second electro-magnet, we turn this on (in a manner in which it attracts), and turn the first one...

Hi all I have a question about this device in https://www.thingiverse.com/thing:2948680/files. Where can I find more information/reading material about this type of mechanical movement (for example, what is the ratio between the motor circle radius, pin location and the table bearings). I wish...

The official solution says ±25.4°, but I'm having trouble reproducing it. Here is my solution: 1) The components of the velocity of firework F with respect to the ground G in the moment of explosion are the following (Notice, I'm using sin, because the statement says 30.0° from vertical.)...

I have a disk traveling on the inner blue track (let's say the blue part is the center of the disk). I want to push the disk outside (as the disk is traveling in a circle) to the outer track. The black part is the wall separating the tracks To that end, I've made some calculations, but I have...

Imagine we attach an imaginary cosmological scale rope to an object that is very far away from us. Before attaching the string, the object would be receding from us due to spacetime expansion. After attaching it, tension would form in the string and we would eventually stop the object. After...

Let's say I have a "nearly ideal" surface such as silicon wafer with around 5 nm roughness and I place something on it (with similar surface roughness) - then how can I move this object step by step at abysmal distances of just several nanometers, under 50 or so? I assume bar friction...

Hi, I am not an engineer and sorry in advance if I am not correct with the terms. I design out of curiosity this Scotch yoke mechanism (left image) based on a scheme (right image). I looked for some equations to find if there is a relation between the R0 , R to R0 distance (which changes...

Researchers at the Center of Excellence for Quantum Computation and Communication Technology released a study published by Nature describing a quantum device that models the motion of electrons in Polyacetylene. The device is not a general purpose quantum processor, but the methods they used...

I was staring at this barbecue fire. While my family was enjoying the heat, I was wondering why the flames all of a sudden shrink and then resize, and also take different shapes. Is there a way to predict this movement? Just curious :smile:

My first question here, so maybe not adequate or in the wrong topic, excuse me. I try to understand vibrating light harvesting antenna in biochemistry but it is a question of physics. We talk about a molecule with an emission spectra peak of about 650 nm. In classical physics electrostatic and...

if I move a weight upwards, will the force exerted on my feet change? I tried standing on scales and lifting a weight but nothing changed as the force seemed to be all in my arm muscles and no change in the weight on the scales...

Hi, I am a game developer and recently found myself in a situation where I wanted to create an enemy that shoots at you given a set of variables. The game takes place in a top down view so there is no need for gravity acceleration, just 2d linear constant movement. The question to answer is...

v(20)=288000 m/s=80000km/h a=(80 000-0)/(20 -0)=4000 m*s^(-2) F=m*a=0.0005*80 000 which doesn't fit any answers

Why the wheel moves? I intuitively think that it should move to right but I don't really understand why. When AB gets longer by x each end gets longer by x/2 so W goes to right and down. This will create torque and body will move. This explanation seems valid but I can't calculate anything and...

I was discussing in another page this topic with someone. He said it's relative in everything, meaning that energy and force doesn't count. This is obviously wrong because the fact that today we can't (maybe tomorrow we can) know which thing is moving towards the other and which not, doesn't...

Albert Einstein said, "Nothing happens until something moves. When something vibrates, the electrons of the entire universe resonate with it." I'm reasonably sure that's hyperbole so what was his point?

Hi, This has long been in my head, I've seen it work out in reality, but I have no idea about the forces involved in this. As I don't have an engineering degree or mathematical knowledge in automotive engineering, I've come here for help. Sorry if I've used some terms where they do not fit, as...

Hi All, My question is in relation to forces that can come through movement. For example, the skull is stated to take around 520 pounds of force or around 2000N: https://www.virginialeenlaw.com/help/how-much-force-can-a-human-skull-withstand.html However, boxers can punch well in excess of...

Hello, I am currently working on a computer program to move on object undergoing circular motion in a spiral of decreasing radius. I hope this is illustrated clearly below (forgive me but it is a sketch and thus not precise in scale): The scenario is as follows: 1. The object starts angular...

When the boat moves to the left, water molecules below it also move to the left. Is it correct to say the reason is because of Newton's 3rd law? Water molecules provide friction force to the boat so force on boat by water molecules is to the right. By Newton's 3rd law, there will be force on...

I consider three material points O, O', M, in uniform rectilinear motion in a common direction, so that in relation to the point O, the points O' and M move in the same direction with the constant velocities v and u (u>v>0). Assuming that at the initial moment (t0=0), the points O, O', M were in...

Summary:: Question concerning the behavior of a ball bearing inside a projectile fired straight up or at an arc. Within a projectile is a 1-inch cylindrical cavity, inside of which is a steel ball bearing that can freely roll along the length of the cavity. When the projectile is fired...

The first ecuation values i am 99% that is correct. But, in the second and three problem i don't know if my results are ok. The problem number 2 i comprobate with the teacher that te aceleration its correct, so, with this i calculate the velocity. I use like example the second problem for try...

I tried to resolve this problem with youtube tutorials help, but, i have a many wrong results. The teacher says that the problem requires critics points, so i know that for that points i need a second grade ecuation, but i don't know how interpreter that points. My results: PD: I don't know how...

Hello to all forum members, I came here in an attempt to find a solution to a problem that has been "haunting" me for some years. I have been trying for some time to understand mathematically the variation in the movement capacity of individuals, based on their effort. In other words, I would...

The only knowledge I have about such reflection questions is theta=2theta. But I missed class when this was thought. Please I need help and guide

So my idea was that to reach the equilibrium position, the final moment of force has to be 0 (so in the end the forces will “eliminate” each other). And I found the equation Fm=B*I*l*sinα, which should characterize the force, which affects wire with the current in a magnetic field, and Fleming’s...

Goal: To have an axle rotate back and forth from one position to the other. We have a motor rotating in one direction How so solve this in a smart/simple way? I'm thinking having 1. one cog on the motor axle, rotating the same way as the motor 2. a second cog connected to the above cog that...

Hello! I've done the following to solve this problem. a) Here I simply put in the time in the equation, s0 is = 0 and after that it was pretty much done $$s(t) = 42 *1 - \frac {9,81*1^2} {2} = 37,09m $$ b) Now here to see when the rocket reaches it maximum altitude and what height it is...