Movement Definition and 637 Threads

Homework Statement A biologist looking through a microscope sees a bacterium at r1→ = 2.2i + 3.7j -1.2kμm. After 6.2s, it's at r2→ = 4.6i + 1.9kμm. a)What is it's average velocity b) What is its average speedThe Attempt at a Solutiona) v→= Δr/Δt v = (r2-r1)/6.2 = (2.4i - 3.7j + 3.1k)μm/6.2s =...

Given an example of a rifle bullet traveling east or west, why does the bullet deviates HORIZONTALLY? (right on the northern hemisphere, left on the southern hemisphere) As rotation speed in the same latitude coordinates stays roughly the same, I wouldn't expect the bullet, or any other...

hey, So I am working on this project where I am trying to come up with a motor set up to drive two wheels of a trolley. The entire trolley weighs 650 kgs and i require a motor with a torque of about 400Nm. I want to set it up in such a way that i want to be able to apply very little force to...

i am still newbie , i don't even know if this question should go here or not , but i will ask it anyway. I have a rod that moves vertically , i need use this rod to make a shaft turn. So i had an idea, what if i made this rod toothed and make it move a gear as it goes up , will that work? if...

here is my question,a simple one that is :- why with the movement of charged particles a magnetic force develops through it?is it have any relation with quantum?explain me all about it?

Hello there! This is my first post here, hopefully I am not posting in the wrong place. Also, I am an engineer and have not used this stuff for years, so please be patient with me, I am pretty sure that my question is stupid :-) I would like to develop a simulation code for charged particles...

Hi there, I always thought that kinetic energy was the energy associated to a movement, ie, I have a ball in movement so I had printed the energy of my body on it when I kicked the ball, right? So I gave energy to the ball that started to move it. energy -> movement. However, I was reading...

Homework Statement A newly discovered planet has a mean radius of 1230 km. A vehicle on the planet's surface is moving in the same direction as the planet's rotation, and its speedometer reads 130 km/h. If the angular velocity of the vehicle about the planet's center is 6.18 times as large...

Essentially, we are writing a report on the movement of a trapeze but I am very stuck. My main questions are: why do trapeze slow down? What effect does gravity have on the trapeze? My personal research question is what were to happen if the trapeze were on the moon rather than earth, would...

Am I right in thinking that any bit of mass, eg. me, or my spoon, or a planet, can never not be moving? And also as the matter inside me changes to something else, re-assembles later, etc, for-"ever." So respective to that, space time is constantly distorting in it's path? From the...

Hi Guys, I am currently building a robot and I am doing some research for the movement of the robot on vertical objects preferably walls made of steel and horizontal grounds. These walls contain some oil spills. To be clear the main purpose of the robot is to do inspection (electrical oil...

Hey all, suppose there's a particle with Potential Energy : U(x) = A*[ x^(-2) - x^(-1) ] , where A is a constant. I'm supposed to find the energy required to make the particle go from periodic movement to unlimited movement. First thing I did was U '(x) = 0 to find the balance points, now...

Has anyone studied the effects of the central black holes in the galaxy's, on the rotation of the galaxy's spiral arms. When the black hole spins, do the stars in the surrounding galaxy spin in the same direction, does the speed of the spinning black hole affect the rate of rotation in the outer...

Hi all, So I'm looking at how far an animal can move based on its basal metabolic rate and cost of movement. The total cost of these two is 45 Watts. It has 1.5 kg of food reserves with an energy density of 5.2 x 10^6 J per kg = 7800000 J of energetic reserves. All I want to do is see how...

Hello everybody! I read that because of about 4 min difference between sidereal day and solar day, at the end of a year each star has rotated 366.25 times(apparently). I looked up in software such as Starrynight, the position of for example Sirius at 1 September of 2013, 2014, 2015 and so on. I...

I understand the the motion of charges in a particular direction constitutes a current, and from my understanding, the more charges you have flowing in the same direction, the stronger the current. Are there significantly different properties that arise with strong current? After watching this...

I am having a tough time understanding the principle of least action and I would really appreciate it if someone would clear it up for me. And from what I understand from it, it can be used to predict particle motion?

Calculating convection movement. Is there a simple way of calculating the mass flow inside a torus as a result of a difference in temperature. Asuming the torus is placed vertically and the heat source and sink placed in this way. Thank you very much. Cold side ( o ) Hot Side

Hi guys, i would need some help with movement on ellipse. I am using basicequation for figuring out position on ellipse : basically getting degree, converting that to radians and using radians to figure out posX and Y. Basic stuff. degree += speed * Time; radian = (degree/180.0f) *...

I am trying to write a program to show the flight of a satellite in the neighbourhood of two large planets. In all of this the mass of the satellite is negligible. I have the potential energy from planet1 = pe1 and the potential energy from planet2 = pe2 and the kinetic energy of the...

My question stems from the idea from GR, that space is a physical quantity bended by gravity. The question is this: If space be a tangible, physical, thing, in which gravity effects it, among other things, then shouldn't the Earth's movement(and the movement of other bodies) be dragged by...

Here is a plank in empty space(There are no forces except one) .Someone is pushing it on a side.Will it rotate or Move straight in the direction of the force?

Relative movement or Observer knowledge about motion Are these things important about special relativity If its important,why and how? Thank you

Should an object for argument sake a cube be traveling in space at a stable rotation, if a small object traveling at a high velocity collided with the edge of the cube enough so that on Earth if fastened the cube would spin. in space however would this object spin/rotate in a single position or...

Wikipedia defines work as: What if in space,where there is no external force acting,Someone applies a force and the object will move on to a infinite displacement forever(Newton's first law).Is work done? Another question is from that wikipedia: Work done=Energy transferred . That means...

Homework Statement Drawing of the Problem An electron rests on plate A and is accelerated by a 400V Plate (B). From there, Calculate the Maximum Voltage a 3cm plate (C) can be charged before the electron makes contact with the plate. Directly opposite Plate (C), is a +100V Charged Plate...

The quote is from Jake Goldberg's Albert Einstein: the rebel behind relativity: p. 53: "As objects begin to move rapidly through the dimension of space, their movement throught the dimension of time must slow down, because no object can move through space-time faster than the speed of light."...

On a layman level I'm pretty familiar with the principles of modern physics but there's something about relativity which I'm afraid I do not understand properly. Relativity tells us that non-accelerating motion is relative to the observer. Saying that I am traveling at 100 Km/h relative to you...

I'm not sure if this is the right area of the forums. If it's not. Tell me which area would be better and I'll post this there. Time Travel- Would have to be space travel... and possibly faster than light If the time traveled and the time it takes to travel took less time to travel...

I have seen a depiction of the Sun traveling in it's orbit in the Milky Way. In this depiction, the Sun was bobbing up and down. 1. From what does the Sun get its movement orders from? (The black hole at the center of our galaxy?) 2. How come it bobs up and down, but none of the other...

This is partially a question and partially me explaining my understanding of c, frames of reference, and relative motion to see if I have it straight. So, c (the speed of light) is always the same when measured by an observer regardless of the intertial reference frame from which it is...

I've been researching this for hours and yet can't seem to get an understanding. So, let's take an electron fixed in space. At any given time it has an electrostatic field around it which decreases with distance and uses photons as a force carrier. It has an elementary charge e- and will...

How can a particle move downwards and be displaced upwards? Sounds paradoxical. I understand the part about movement but not displacement. What's the difference? Isnt displacement like the amplitude so when a particle in a transverse wave move down doesn't it mean its displaced downward?

Homework Statement Hi there! Could you please help me with this question? Am I doing it right? A particle is moving under a force of the form F(r) = -Ar^3 (r-hat). The particle begins its movement at a distance r0 and velocity v0. A. Find and draw the effective potential. Can the...

http://i47.tinypic.com/mt55s7.jpg -See for image You drop a ball on this vertical parabola with point A as starting point and point B as ending point. What is the expected natural movement of the ball that is set into motion with no external force assuming no friction? Would it go all the...

Homework Statement What is the electric potential two-fifths of the way through a parallel-plate apparatus (from the positive plate) if the plates have a total separation of 5cm and field strength of 5000N/C.Homework Equations Difference Potential Energy = Electric Field Strength x Distance V =...

When an object move in space, what decides where it moves to? For instance there's no rule saying you can't move from 0 to 3, but have to move from 0 to 1 simply because 1 is next to 0 in terms of distance.

Astronomy considers only two main movements of Earth, rotation around its axis in a day and the revolution around the Sun in one year; because astronomers do not consider the rotation of the Earth's axis around itself in a year?

Homework Statement A pilot is flying his personal jet at 180m/s, approaching the airport. Near the airport the pilot sees the runway 300m horizontally to his left, but he is moving parralel to it. He banks left quickly, turning in level, circular arc, until the plane has moved 150 m, then...

If light is both a partial and a wave; and the speed of light is an absolute; and a partial traveling at the speed of light experiences zero passage of time (I think that’s what Einstein was on about)how can light move at all through space time? Or is that what we experience as matter?

Nervous message -- nerves sensing heat & mechanical movement As we know when we stimulate a nerve, there is a message form of electric nature. But I want to ask how mechanical or heat or... stimulation is transformed into electric message?

Is it possible for motion to exist at 0 Kelvin?

Homework Statement Conservation of energy: looking for equations to solve the following Homework Equations A pendulum with length l = 0.50 m and with a negligible mass. The string is attached to a fixed point A and the pendulum swings in a vertical plane. The pendulum has a speed v = 2.15...

We have 2 particles A and B - velocity vectors: v(A)=(2; 0), v(B)=(0; 3). In time t=0 these particles were in r(A)=(-3; 0), r(B)=(0. -3) (both are also vectors) Determine a vector of the reciprocal position of A and B (means the position of one relative to the other). Compute time and length...

Hello, If the position of a particle w.r.t time is given as X=Acos(t)exp(-at), and Y=Asin(t)exp(-at), then it is pretty clear that the particle is moving in concentric circles around the origin with decreasing radius. Is anything else ought to be stated in order to describe the motion of the...

A spherical or cylindrical object would roll on a plane. However,object with other shapes(e.g. A cube or a retangular object) would slide on a plane. Why?

I'm doing some research trying to find behavior of particles at speeds faster than light. I'm wondering if anyone knows if there are any papers on this, as I can't seem to find any except for papers on superluminal movement rather than what happens when particles actually travel faster than the...

Homework Statement At the height of H, from a plane with the speed of V, there is an object "thrown off". H = 10km = 10 000m V = 300m/s To be determined: - total distance from the plane to the falling point - S - the time the fall takes - T do not have to take aerial friction into...

A billiard ball is at rest on a billiard table. The player hits the ball with the stick at an height h above the center of the ball, so Vcm just after the hit is v0. The final Vcm of the ball is 9/7 * v0. Prove that h=4/5 * R I have here a question and as you can see Vcm at the final stage is...

What is the reason for revolution of electrons around the Atom?