Movement Definition and 636 Threads

Homework Statement Im pretty much looking for a little push in the right to direction as to how to get me started on using a differential equation to model the up and down movement of a solid cube in water when a.) it is never submerged, and b.) when it can be completely submerged. The...

Homework Statement In Figure 6-62 a fastidious worker pushes directly along the handle of a mop with a force . The handle is at an angle θ = 40° with the vertical, and μs = 0.61 and μk = 0.48 are the coefficients of static and kinetic friction between the head of the mop and the floor. Ignore...

Homework Statement A 750 gram grinding wheel 25.0 cm in diameter is in the shape of a uniform solid disc. When it is in use it turns at a constant 220 rpm about an axis perpendicular to its face through its center. When the power is switched off the wheel stops in 45.0 s with constant angular...

What is the answer? Should be B Please Explain the reason behind I don't understand how an induced Magnetic Field will cause the coil to move. (Not Homework)Source:tycphysics.org/TIPERs/TIPER%206_20_02_keys%20pdf/EMI%205a_Key_6_02.pdf thanks for helping

1. I understand that it is impossible to say if something is absolutely stationary, for example wrt the universe, and that there is no such thing as absolute movement now 2. if you place a point source of light at the origin, “O”, of a Cartesian coordinate system. At t1 the point source of...

if we had a scale with a mirror on top then we zeroed the scale and the scale was on Earth well in our case we need a stronger gravitational field and a light beam comes by the scale and then enters the strong gravitational field thus the light is bent into the scale and hits the mirror...

Hydrodynamics--- rotational movement. Hi,I am not sure whether my solution is correct. I am not an expert in this area either. Could anyone here help me to check my solution? Thank you If i hang a block like a cube in water. If we look from the top view, there will be two side A and two side...

hi i am going to design a parallel plate rheometer as a part of my project.in parallel plate rheometer, the fluid is sandwitched between the plates and rotation is given to the top plate.top plate is made with shaft, rotation is provided to the shaft by servomotor and for placing the fluid and...

i have read in some articles that when 0 Kelvin is achieved then particle movement within the cooled substance ceases. but my doubt is that einstein said that all objects have constant movement. this means that if the particles really stop then they will kind of stop in time because it is longer...

we got a rock which has a smaller rock inside, we tilt it by a small angle. why the torques is negative why they do -torque=I*angular accelarations ?? http://img262.imageshack.us/img262/1466/41649510.th.gif

Homework Statement http://img5.imageshack.us/img5/348/snake.gif The figure above shows a piece of flexible wire lying on a frictionless table top. The wire can slide around and change its shape freely, but it cannot move perpendicular to the table. Part I If a current were to begin to...

Hello all, First off, I am not sure if these questions belong in this category. For a couple of years now I have been interested in physics/quantum mechanics, and a while ago I decided it was probably my main interest. After realizing my school did not offer physics, and therefore not...

hi. as a non-physicist reading physicsbokks i have a problem understanding how, in richard feynmans words, "time itself", is measured. feynman seems to move from clock-measurement to "time"-measurement without a justification. as tsr clairly states time-dilation i have a problem of...

This is a problem that I am just having some trouble wrapping my head around. I don't know if I am doing it correctly. Homework Statement You are a member of a group designing an air filtration system for allergy sufferers. To optimize its operation you need to measure the mass of...

Homework Statement A particle moves in such a way that its position z, in meters, is given as a function of time t, by the equation z = 2t^2 − 3t^3. At what times is the particle at position z = 0? (two answers; one is 6E-1) Homework Equations z = 2t^2 − 3t^3 The Attempt at a...

i got a mass "m" which is stuck to a spring which is hanged from the sealing . k-the spring coefficient the formula for acceleration is a=-A*w^2*sin(wt+u) i need to calculate the force which the spring exerts of the mass in any given moment t=0 is when he was moved downward by distance A...

Is a proton's movement considered an object of Quantum Mechanics? I had this thought a while ago when we were studying movements of protons in a force field, specifically inside the field of a charged capacitor. The thing is that we used Newton's Second law to find the magnitude of the force...

I have been doing some experimenting with a relatively short cylindrical permanent magnet and a solenoid with DC current applied. I would like an explanation as to why these two things happen. The OD of the cylindrical magnet is just a little bit smaller then the ID of the solenoid. Placing...

1. The only force on a 5.0 kg object has components Fx= 20N and Fy= 30N 2. Find the acceleration of the object and its direction of movement. 3. I think I'm supposed to somehow use Soh Cah Toa inorder to find something (I don't know what this would help me find). I need to use...

The power is the amount of energy being transferred, the energy change P = Fv at specific moment of time. The kinetic energy is proportional to speed: E = mv2/2. I wonder how a finite force starts moving an object at rest. The zero velocity implies zero power P=0, which implies zero kinetic...

Im talking calc and physics in high school right now and I was bored and messed with my formulas but I need some help now.It's for rotational movement. If I have \varpid\varpi=\alphad\theta and then I take the integral will it be (\varpi^2)/2 = \alpha\theta or did I do it all wrong?

Homework Statement Hey guys. Where is the force which is created by the electric field, directed to? I think it's towered the bottom plate but I'm not sure. 10x. Homework Equations The Attempt at a Solution

This is my first post here, and I'm not really sure where I should have made it. If it's in the wrong place, please go easy on me and could an admin move it to where it should be. It's not strictly a homework problem, but it's fairly specific question, and not very deep or philosophical...

1.Your suitcase is on a baggage carousel, Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 9.10 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.740, and the angle θ of the...

Homework Statement Well, i have built this solar car, and the objective is (in my class) is to see who can get there solar car teh fastest in 20 metres (i.e. who can clear teh 20 metres in teh lowest amount of seconds). My motor specs are 23,500rpm 350gm-cm torque, 150mA all at 14.8 volts. My...

Homework Statement Two long coaxial cylindrical metal tubes (inner radius a, outer radius b) stand vertically in a tank of (dielectric) oil (suceptibility X-e, mass density rho). the inner one is maintained at potential V, the outer one is grounded. to what height (h) does the oil rise...

What will happen to a body that is not moving at all? What is its time and what is the shape of its space? I have been wandering about these questions for a long time now. I am beginning to realize that the space time continuum of a body / object is the product of movement of that body.If...

Homework Statement The question includes a graph of a wave (on a string) with several points labeled on the graph. We are asked to determine the direction of the transverse velocity of each point on the wave as well as the transverse acceleration. Homework Equations The Attempt at...

Hi, i want to know what are the real effects of air (drag) in the projectile movement and free fall, i mean how drag or air resistance is calculated in both movements, with equations.

(A) being a common pivot point for (B) and (C). In relationship to (A), I would like to have (C) move twice the DEGREE OF ANGULAR movement as (B). Any suggestions or thoughts on how I might accomplish this would be GREATLY APPRECIATED!

Hi ... I was trying to figure out a mechanism which allows for up and down movement. I figured a piston with crankshaft... anyone has any other possibilities? Thanks

When 2 objects placed one on each other and one of them pulled, the second will move in a contrary way. there is a way to proof it with Newtons law ? tnx .:smile:

Hi, So my former knowledge of electricity and its movements made me understand that only electrons move from the negative electrode to the positive and then through the wires back into the battery. But as I am reading from my textbook (about capacitors) I am starting to feel that even protons...

It seems to make intuitive sense for cloud movement to be dependent on wind, but is it actually true? Isn't the Coriolis Force a bigger factor in cloud movement?

Homework Statement Everything is in the pictures. I did part A, I have a problem with part B. 10x in advance. Homework Equations The Attempt at a Solution

hi, i'm not sure if I'm posting this in the right directory, but I'm trying to figure out a way to make a mesh that is responsive to sound via light and movement. (i.e. some form of musical beat will cause this surface to ripple and light up). this is for an architecture thesis. the movement of...

A uniformly accelerating movement problem that we found in our book and we wanted to solve, but we are not sure if our solution is right: Homework Statement Two cars, (1) and (2), initially at rest, start to move from the same point, in the same road. Car (2), however, starts to move 3.0...

what would be the difference between the idea of being at point A and moving toward B in space-time; and being at point A and not moving and B not moving but the space-time between them moving and warping out of the way?

I want to model a car movement. The equations are: \sumF = ma \sumT = m \alpha The forces are, weight of the car, normal force and f the friccional force, but also the engine provides a constant rotational acceleration in my model. I understand that the frictional force is the one...

Homework Statement : VIEW ATTACHMENT FOR JPEG IMAGE of a) and b). Predict the direction of the charge (into the page or out of the page) for a) a proton moving into the page in the (-)z-direction when the B field is in the (+)x-direction, and for b) an electron moving into page in the...

The Earth is moving at a great speed about its own axis. Something inside a moving sphere also moves. Why don't we move with the earth? please explain me.

Homework Statement Write the difference between movement in one dimension and movement in two dimensions,also which are the different types for each of these movements Homework Equations The Attempt at a Solution

I want to move 30lbs vertically on a platform. To do this I will have a rotating threaded rod driven by a motor. How much torque, hp, rpm do I need? I'm guessing the pitch of the threads will be important. As far as speed goes, I only want the platform to move about an inch in 1-2 seconds...

Hi all! Im working on a small 3d tennis game, but I am not good with math. Can anyone make me algorithm for tennis ball movement (simulation). I have this parameters: ball starting point (x=left/right,y=up/down, z=is forward/backward), ball ending/bounce point which y is always 0. y at (z=0)...

in a microscopy class: problem is to illustrate the path of a positron on both sides of the axis in a coil produced magnetic field. consider both cases of the particle's velocity and the magnetic field being a)in the same direction & b)in opposite directions. i have no clue. any help? would it...

Hi there, I'm an electrical engineering student currently building a 2 axis solar tracker. I need to build the frame and I'm posting here because I have no mechanical knowledge at all ... The system is basically two motors, each for each axis which rotates a small solar panel (one rotates...

Let's say the universe exists as a collection of related static 3-d spaces, like in Julian Barbour's book The End of Time. Nothing ever actually moves. The illusion of movement comes from moving from one of these spaces to another which is closely related to the previous one. It's similar to the...

My sculptor wife has asked me to develop an electrical system for a kinetic sculpture that creates a 30 RPM movement at a whisper quiet level and yet fits into the palm of a hand. I'm looking at a 17mm diameter x 55 mm long mini-gearhead motor listed at "352:1 ratio that runs at 24 RPM @ 12 Vdc...

Linear movement --> Rotation Hey, I'm wondering how many different ways there are to transform linear translation into rotation. The ones that I'm a familiar with are; rack and pinion, Scotch yoke, Helical spline, crankshaft.. Are there other good ways of accomplishing this? Thank you for...

Hi This question really matters me and I would like to someone to point me out (rigorously if possible) why and what makes charge move in ideal conductor. All good conductors are modeled as being ideal so that the Maxwell equations inside the conductor needs not to be solved. So as electric...