Displacement Definition and 999 Threads

Just a quick question: I was wondering whether the Force Applied to a spring equates to the stress and whether the Displacement of a spring equates to the strain. I have been researching this on the internet and the units of stress are completely different to Force Applied and the same for...

Hello, so here is my problem. Homework Statement I am given tensile data, which is displacement (mm) and load (kgf). also I am given width(mm), thickness(mm), gauge length (mm) and cross-head speed (mm/min). How do i make a stress strain curve from this? The Attempt at a Solution...

Homework Statement A train moving at a constant speed of 100km/h travels east for 40min, then 30o east of north for 20 min, and finally west for 30min. What is the train's average velocity for the trip? Homework Equations The Attempt at a Solution I think I have to calculate displacement...

Hello everybody, I hope I am posting this under right topic. I am running a research project and we are recording videos of subjects from both frontal (back) and saggital (side) plane while they are walking on the treadmill. I put 10cm long calibration marker on the back of the subject. This...

estimation of displacement in Frontal plane from sagital plane Hello everybody, I hope I am posting this under right topic. I am running a research project and we are recording videos of subjects from both frontal (back) and saggital (side) plane while they are walking on the treadmill. I...

Homework Statement A particle moves along the positivex-axis .At time t seconds after leaving a fixed point O from rest, the displacement of the particle from O is x cm. The acceleration, a of the particle is defined by a=5-3t , 0<=t<=1 =-(4t+1), t>1 Find the speed of the particle...

Homework Statement http://img690.imageshack.us/img690/5817/problem001.jpg Homework Equations Chain rule : dv/dt=dv/dr*dr/dt Integration The Attempt at a Solution I can only find the speed (the magnitude of the velocity), that is...

Hi everyone, I have the following question about coherent states: It is known that the creation operator has no eigenket. However, the action of a creation operator a^{\dagger} on a coherent ket |\alpha\rangle can be written as a^{\dagger}|\alpha\rangle = \left( \frac{\partial}{\partial...

1. Hi i need help with this question, Show, using maxwell's equations as a starting point, that the discontinuity in the component of the electric displacement normal to a boundary between different media is equal to the free surface charge density on a boundary. i have tried by using the...

I read this in book that if we consider a conductor in which current I is flowing at a potential difference of V then in time ∆t charge equal to I ∆t will flow across the ends of conductor. But in time ∆t that much amount of charge will only be able to travel distance equal to drift velocity...

Homework Statement A car is traveling at 56.0 km/h on a flat highway. If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? Homework Equations μ=-a/g v2=vo2 + 2 a x The Attempt at a Solution 56.0...

Homework Statement conductivity=1/100 siemens/meter epsilon=3*epsilon[0] at which frequency displacement current is equal to conduction current? Homework Equations The conduction current is LaTeX Code: I =C * \\frac {dV}{dt} The displacement current D can be calculated from...

I am confused about displacement and distance. displacement is the shortest possible path between two points in the space or plane in the particular direction.in the value of displacement a magnitude,unit,and direction is givin. distance is the magnitude of displacement or the any path...

Homework Statement A 6.0 g bullet leaves the muzzle of a rifle with a speed of 338 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.9 m long barrel of the rifle? Homework Equations F=ma x=vt a=v/t The Attempt at a Solution x=vt...

Alright, we have triangle abc with hypotenuse c. So, if you add vector a and vector b, the answer is vector c. Now, according to the pythagorean theorem, this would not make sense. But the pythagorean theorem is DISTANCE. I am guessing that this phenomenon has something to do with using...

What the book says: Displacement is the shortest distance between two points, and can be positive or negative. Question: What about when you're working with two axes? To find the point you use the pythagorean theorem... making displacement always positive. Is this related to magnitude?Distance...

Hi, Sorry about the question, as I'm sure its super simple, I'm new to physics :) If I'm running a on a circular track and I do say 4 laps (1/4 mile each lap, 1 mile total) is my displacement equal to 0. Since I ended the run exactly where I started? Thanks for the help!

Dear all, Here is a problem that I need to get an answer. Kindly look at the image attached and help me by solving it. Many thanks in advance, Jnanesha KS

Hi all who I can find the displacement in this Q ? A jetliner lands with a speed of 90 m/s on runway . It runs with constant speed for 2 s , before the brakes are applied . The brakes produce a deceleration of 20 m/s2 . What is its displacement on the runway . I try to...

I recently bought some pontoons to build a floating camp on. I was wondering if you guys can give me the weight capacity the pontoons could hold at full submergersion and half? The Pontoons are 5ft 3 in wide, 3 foot tall and 20 feet long. The pontoos are U shaped. The pontoons will be docked...

Homework Statement 2. At time t = 0, the displacement of an infinitely long string is: y(x, t) = sin(pix/a) for −a ≤ x ≤ a The string is initially at rest. Using d’Alembert’s solution for speed c, sketch the displacement of the string at t = 0, t = a/2c, and t = a/c. Homework...

Homework Statement The acceleration a ms^-2 of a car is given by a=18t - 4 where t is the time in seconds.Derive expressions for the velocity v ms^-1 and the displacement x m if the initial velocity and displacement are both zero Homework Equations The Attempt at a Solution would...

Homework Statement A 0.1[A] current is charging a capacitor that has square plates 5cm on each side. The plate separation is 4mm. Find (a) the time rate of change of the electric flux between the plates and (b) the displacement current between the plates. The Attempt at a Solution So I had...

Hello all, excited to be on the forums. I'm having trouble solving a problem from one of my past exams (prepping for final). Could you please guide me? The displacement associated with a wave on a string has the functional form y = 0.2 cos (10x - 4t). What is the wave speed? The answer...

Homework Statement A mass on a spring obeys SHM.Given that the mass is initially at the equilibrium position,has an initial velocity of 2m/s,and a nastural frequency of 2 rad/s,Find A and φ After 13.2 sec what's the displacement of the mass Homework Equations ψ=Αcos(ωt+φ) The Attempt...

Homework Statement A traveling sound wave causes a variation in air pressure according to the equation: ∆P = 20.0 sin(15.5x − 5.32 × 103t ) where x is in metres, t in seconds and pressure is in pascals. What is the amplitude of the displacement of the air particles caused by this...

[SIZE="2"]Moderator's note: two threads merged into one. -- Redbelly98 Homework Statement what is the relationship between the launch angle and the displacement of a projectile, is it possible to say that the launch angle is proportional to displacement, can it be done mthematically by...

my book is only introductory and they only gave me the equation S = t*sin( theta1 -theta2)/cos(theta2), i like to know how its derived so i can better understand and memorize this... i know i can probably work this out myself but i don't know where to start i am assuming it has something to...

Embarassing question-- Displacement equation Homework Statement Im just trying to understand why the equation for displacement along a line is x= 1/2(v_{0}+v)t. If the other equation for displacement is v*t, where does the 1/2 come from? Homework Equations v*t x= 1/2(v_{0}+v)t...

Homework Statement Starting from one of the more familiar Heisenberg Uncertainty Relations, derive the Uncertainty Relation involving angular momentum and angular displacement and explain its significance. Homework Equations The relevant uncertainty relationship is that between...

Homework Statement a)find the velocity when x = 3, b)find the time taken to travel between x=1 to x=3. when x = 1, v = 0 Homework Equations a=2x The Attempt at a Solution a)using the chain rule I got v = 2x^2 + u (u as a constant), but I think that's wrong. i tried using...

Hi, This question came up on my midterm and I had no idea how to answer it without redrawing the entire curve as a stress vs. strain curve (which obviously took too long to do). Anyway, I'm just requesting a general procedure, not a numerical answer. If you had a Load (y-axis) vs...

Homework Statement A 0.10kg mass is on a spring with k = 0.10 N/m. At time t=0s it crosses x=0m with a velocity of 2.0m/s. What is its displacement when v=1.0m/s? Homework Equations x(t) = Acos(wt + \varphi) v(t) = -wAsin(wt + \varphi) w = \sqrt{k/m} The Attempt at a Solution...

If you have a perfectly flat, rectangular raft and a perfectly flat, rectangular boat, which will displace more water? Or will the water displacement be the same. I remember that the water displacement is dependent on the shape of the floating object and the weight, but I can't remember exactly...

Homework Statement A cyclist is traveling with a speed of 11.0 m/s when she applies the brakes. After slowing for 2.5s, her speed has been reduced to 3.0 m/s. If she continues braking, how much longer will it take her to stop? I found the deceleration to be -3.2 m/s^2 V1 = 3.0 m/s V2 = 0...

I don't need any help for the engineering maths I'll be doing after but if I anyone could advise me on how to write a program that would take a set of x and y values and then give me back the y values at certain intervals on the x-axis I would be very grateful. I've got colossal amounts of data...

Hey guys, I need help. Say i take a picture of a dot in a frame followed by another picture whereby the dot has moved to another spot in the frame. How do I calculate the distance between these 2 dots? At the end, i would have 2 jpeg images of the dot at 2 different locations. What I'm trying...

Hi everyone, I'm trying to understand the derivation of D(x,t) = A \sin{(kx - \omega t + \phi_o)} which is the displacement equation for a sinusoidal wave. The way my textbook (Physics for scientists and engineers by Knight) does it: Look at the graph of displacement versus position at time...

Hello there , http://www.zshare.net/image/73581857700fb471/ If I am asked about the displacement covered by the man in this case , so should I write the vertical distance covered by the man (15 m) or the horizontal one (30 m) ??or they both work?? And why?? My question is the same for a...

Homework Statement An object goes from one point in space to another. After it arrives at its destination, its displacement is _________________ than the distance it traveled. A) either greater than or equal to B) always greater than C) always equal to D) either smaller than or equal to...

Homework Statement http://img52.imageshack.us/img52/5412/displacement.jpg The Attempt at a Solution First I calculated the equation for the line using point-slope form. I got y = 3x-9. Then I found angula velocity at 8 seconds, which turned out to be 15 rad/s. Then I drew the complete...

Homework Statement A particle is projected with initial velocity u\cos\alpha\vec{i}+u\sin\alpha\vec{j} m/s from a point 0 on a horizontal plane. If this particle passes through two points whose displacements from 0 are 3\vec{i}+\vec{j} and \vec{i}+3\vec{j} show that the range is...

Homework Statement 2.78 kg block is pulled (from rest) by a force (horizontal surface) of 15.8 N. The coefficient of kinetic friction is .106. What is the velocity after 2.88 m? Homework Equations fk=N(uk) Vf=sqrt((2*W)/m The Attempt at a Solution I attempted to find the final...

I have been working on the following two problems and I can't seem to get any progress. Any help from anyone would be greatly appreciated. I know it seems simple to those who are familiar but I have no background in this type of equations. 1. A helicopter travels northwest 70.7 miles, then...

Homework Statement What is the a.d of each of the following hands of a clock in 1h? the second and? the minute hand? the hour hand? Homework Equations That's what I'm looking for The Attempt at a Solution I'm having trouble getting it on paper, just a description of how one of...

I was told that Hooke's Law (F=-kx) only accounts for small displacements. But for some objects the displacement can be greater than with others. I was wonderinig which quality of the objects is responsible for this?

wind speed? Homework Statement A car leaves point A and drives at 80.0km/h [E] for 1.50h. It then heads north at 60.0 km/h for 1.00 h and finally [30o W of N] at 100.0 km/h for 0.50 h, arriving at point B. a) Determine the displacement of point B from point A. b) A plane flies directly from...

Need Some Help With Displacement...please =) I'm working independently on Grade 11 Physics, and ran across a displacement question I need some help with. So here goes: 1. Jessie drove north at 45km/h for 20 min, then turned West and drove at 54km/h for 27min. Finally she drove South at...

Homework Statement Hi, I'm new to physics and to theses forums. Hope to learn a lot and succeed in physics for school and most likely university. I'm just stuck on this one question: Will displacement and velocity always have the same direction? Thanks in advance.

Hey, guys! I just started my senior high school physics and calculus courses. So far all we have done is the basics of vectors. I can find the resultant displacement of 2-3 vector problems fairly easily. My physics teacher told us to try and make up our own questions, to see if we could do them...