Displacement Definition and 999 Threads

Homework Statement What is your final displacement if you walk 3 blocks east, then 4 blocks north? 7 blocks, northeast 5 blocks, 53degrees N of E 5 blocks, 53degrees E of N 1 block, north Homework Equations square root of 3^2 + 4^2 = square root of 25 d= 5...

Homework Statement A wave is sent along a long spring by moving the left end rapidly to the right and keeping it there. The figure shows the wave pulse at QR - part RS of the long spring is as yet undisturbed.Which of the graphs correctly shows the relation between the original position x of...

I'm having a conceptual problem and having a hard time putting it into words. I think I'm assuming a lot of things have confused the sh*t out of myself. Sorry if this is really confusing and flawed in logic. So, let's say we have a graph and it's displacement versus time. The slope of the...

"Qausi-static" displacement current (Purcell) Hello all, On page 329, chapter 9 of Purcell's E&M book, he describes why the "displacement current" produces nearly zero magnetic field for slowly varying fields. By taking the curl of the displacement current Jd, he shows that...

Can magnet fields deflect displacement currents? Could displacement currents be made to propagate in spirals like those in a cyclotron? Do they travel close to the speed of light? Can they be focused into beams? Can they transmit electrical energy at a distance? Are they subject to the same...

http://img267.imageshack.us/img267/9636/qw5e64a2d1sda54.png Hi guys. i have a question that needs verification. Referring to the above diagram, Please determine the Moment, M (Nm) needed in order to hold the mechanism in equilibrium state as shown above by using "Method of Virtual...

Homework Statement how does y= y0 + v0t + 1/2 at2 become v = v0 + at ? know v= dy/dt Homework Equations The Attempt at a Solution dy/dt = dyo/dt + v0 + at v= vo + vo +at v= 2vo + at

hey there, I'm a little confuse on how to draw a s-t graph from a v-t graph :( based on the graph attached, the displacement of C is lesser than D, but why the s-t graph is not like in a 'bell' shape ( curve down from D to C) ? instead it went up? if the question were to ask for a...

Homework Statement Compute the magnitude of the displacement (\vec{}R and the angle with respect to the x-axis. Homework Equations The Attempt at a Solution A = 10m * sin30° \hat{}y+ 10m * cos30° \hat{}x \vec{}A = 5m \hat{}y + 8.66m \hat{}x B = 15m C = 20m * sin80°...

The highest note written for a singer in a published score was F-sharp above high C, 1.48 kHz, for Zerbinetta in the original version of Richard Strauss's opera Ariadne auf Naxos. The wavelength of this wave is 0.232m. Suppose people in the fourth row of seats hear this note with level 79.8...

the distance from Islamabad to my hometown "sialkot" is 300km. if i use helicopter what would be the displacement ? Thank you!

[b]1. When someone gets shot out of a human cannon with an initial velocity of 15 m/s and they have a mass of 60 kg. Final velocity is 0. Maximum constant force is 3000 N. This is free fall so acceleration is 10 m/s^2. There is no friction. So when you look at my attempt in solution I got the...

Homework Statement Find an expression for the angle of displacement from the vertical with which a mass hangs in the gravitational field of the Earth as a function of latitude λ. Homework Equations The Attempt at a Solution I don't even understand what the question is, can...

Hello, I'm new on this forum. I hope I could help some of you next days. But today I have a question for you. I have a geophysics oral exam on wednesday. The course material is not clear, and I don't understand the wikipedia pages. What is the physical difference between displacement current...

-------------------------------------------------------------------------------- In the graph below, forces labelled positive act in the direction of motion of the object, forces labelled negative oppose the motion. The object under consideration has a mass of 2.0kg and was initially at rest...

In the graph below, forces labelled positive act in the direction of motion of the object, forces labelled negative oppose the motion. The object under consideration has a mass of 2.0kg and was initially at rest. Calculate its kinetic energy and speed when a) d= 2.0m b) d= 4.0m c) d=6.0m d)...

Homework Statement A beam of light makes an angle of 26 o with the normal of a mirror made of 2.4- mm-thick glass silvered on the back. If the index of refraction of the glass is 1.50, how far is the point at which the beam leaves the glass surface (after being reflected from the silver...

Homework Statement block of mass m = 5 kg is connected to a spring having stiffness constant k = 49 N/m, as shown in the figure below. The surface between the block and the table has μk = 0.1 In this figure, the block is presently held in place with the spring stretched by x1 = 0.8 m...

Homework Statement This is not a homework question, but rather a review question. I have the answer, ill post below, but have no idea how to get to the answer :) Question: "A constant force of 90.0N acts on a ball while it has a displacement of 1.40m at 10 degrees below the x-axis. The...

1. A single phase half controlled bridge rectifier operated from a120V 60Hz ac supply. The load current with an average value of I is continuous and negligible ripple content. If the delay angle of thyristors is 60, calculate, i) The harmonic factor of the input current...

Homework Statement The amplitude of simple harmonic oscillation is A = 10 cm. Find a displacement x when K = 1/6 U. Here K is a kinetic energy and U is a potential energy. Homework Equations KE = \frac{1}{2} k A^2 U = \frac{1}{2} k x^2 The Attempt at a Solution I'm not sure the...

[b]1. Homework Statement What should be the value of Work,if vertical component is 2/3 time to the horizontal component of the applied force,while displacement covered in the direction of applied force is X meters? Homework Equations W=F.d.....(1) The Attempt at a Solution IF...

Homework Statement An object moves with its position obeying x=5t^2-6t^2 and y=3t^-1+4t^4. What is the magnitude of its acceleration at t=1s; a)57 m/s^2 b)34 m/s^2 c)26 m/s^2 d)44 m/s^2 e)0 m/s^2Homework Equations x=5t^3-6t^2 y=3t^-1+4t^4 The Attempt at a Solution Second derivative of the...

Homework Statement I'm trying to calculate the angular displacement. A pendulum with length L is released at θ=0.10rad at 0s. Really not sure how to calculate the angular displacement from this. In a previous question we calculated the values of omega, and phi. Homework Equations I...

Homework Statement For my class we did a mini-lab that asked us to stand still and long jump. Kind of confused about how to solve because our teacher is horrible. I am supposed to calculate the vertical velocity at take off (which I thought was 0m/s but someone told me it's at the peak of the...

hi everybody, suppose we are viewing an object in a pool whereby the object is actually at the bottom of the pool, ...so it will appear as if it has been displaced. what formula can we use to calculate the displacement of the object...?? are there any conditions applicable..help me with this...

Homework Statement A block with mass m = 3.57 kg is attached to a spring with spring constant k = 165.7 N/m and negligible mass. The coefficient of kinetic friction between the block and the table is µk = 0.239. The box is displaced from its equilibrium position to the left by 0.216 m. If the...

I am having a lot of trouble with my homework. If anyone could help me, it would be much appreciated. The Smith's go on vacation. They travel 16.0 km north/west; then turn 27 degrees to the left and go 135 km; then 294 km south/west. What is their displacement from home? So I found the X...

Having trouble with my physics homework, if anyone could please help me with how to this, that would be awesome. My teacher says we are supposed to find the X and Y componenets and then add them, but I don't know how to find them. The Smith's go on vacation. They travel 16.0 km north/west...

Homework Statement I am having a nightmare doing homework for my physics test. I have figured out part of the answer but can not figure out what the angle of the displacement is and its driving me crazy... The teacher showed us two methods of how to find the answers, but ended up making...

Homework Statement The radius of a wheel is 0.450 m. A rope is wound around the outer rim of the wheel. The rope is pulled with a force of magnitude 4.64 N, unwinding the rope and making the wheel spin CCW about its central axis. Ignore the mass of the rope. What is the angular...

A car traveling rightward slams on the breaks and skids to a stop (with locked wheels). Find the distance required to stop it. (I have taken away some parts of the question.) The answer became -33.6 m. Why is the value negative? Thank you in advance!

Homework Statement A 180-g wood block is firmly attached to a light horizontal spring, Fig. 6-26. The block can slide along a table where the coefficient of friction is 0.30. A force of 20 N compresses the string 18 cm. If the spring is released from this position, how far beyond its...

Homework Statement What is the displacement amplitude of a sound wave of frequency 160.0 Hz in air at 20 °C at the pain-threshold pressure amplitude of 29.0 Pa? f = 160 Hz Vs = 343 m/s ΔP = 29 Pa Homework Equations ΔP(x,t) = (ΔP)cos(kx - wt) = β*s*k*cos(kx - wt) k = f/Vs The...

Torque, Angular Displacement, Work! Homework Statement The radius of a wheel is 0.525m. A rope is wound around the outer rim of the wheel. The rope is pulled with a force of magnitude 5.45 N, unwinding the rope and making the wheel spin counterclockwise about its central axis. Ignore the mass...

Homework Statement What is meant by lateral displacement? Homework Equations The Attempt at a Solution

Hi The problem given is that there is a Force vector: F=3i(x^2 - y^2) + 2j(x+y) Then we are given coordinates, where all values are in meters and the magnitude of force is in Newtons. The question asks to calculate the work done in Joules by this force in a displacement along line y...

Homework Statement A spring has a relaxed length of 5 cm and a stiffness of 95 N/m. How much work must you do to change its length from 2 cm to 10 cm? k=95 Lnull=0.05 delta x = .1-.02 = 0.08 Homework Equations F=-kx W=Fdcostheta The Attempt at a Solution I honestly have...

Homework Statement A physics student slides a 2.0kg textbook along the laboratory bench to her friend. She imparts to the book an initial velocity of 2.70m/s. μ=0.20. How far away is her friend if the book comes to a stop right in front of her friend Vi= 2.70m/s μ=0.20 m=2.0kg Vf= 0m/s...

Homework Statement An inclined plane of angle θ = 20.0° has a spring of force constant k = 455 N/m fastened securely at the bottom so that the spring is parallel to the surface as shown in the figure below. A block of mass m = 2.71 kg is placed on the plane at a distance d = 0.330 m from the...

What exactly is a double displacement reaction? I searched my textbook for the term--yes, I did check the glossary first--and it proved futile. My teacher alludes to this term and even has one power point slide to it. It says, "When an aqueous solution of sodium carbonate is added to an aqueous...

Hey, first post (: Was just wondering why the formula for distance is x = ½ at2 if v = at and x = vt then why is it ½ when you substitute in a? x = distance v = velocity t = time

Homework Statement A woman running at constant velocity speeds up and accelerates uniformly to the west by running 253 m west in 6.12 s. ff she ends up getting up to a velocity of 5.05 m/s w, how fast was she going originally? If she had run the same disance in 5.50 s, what would her average...

I have been reading Classical Mechanics by goldstein for over 2 months. I have encountered the concept of Virtual Disolacement in that book. Some of my friends have told me that it means a very small desplacement that you cannot see.. However, I am not sure if it is right. Then what is the...

Homework Statement A lost dog travels 30 degrees south of west for 450m. He then smells some food and sprints at 20 degrees east of north for 600m. Homework Equations a) Draw each vector. Label the magnitude and thetas. b)Calculate the vector components c) calculate the magnitude of...

- I need to find the appropriate launch angle that will land an object 65 meters north of my position. Therefore Δdx = 65m [N] - I am told that the time the object take to hit the ground is 5.23 seconds. Therefore Δt = 5.23s - I then used the equation Δdx = v1xΔt to find v1x = 12.43 m/s...

Okay so we have a block attached to a spring with a spring constant of 50 N/m. The spring is in the relaxed state. We apply a force 3N along the positive x direction. The block moves along the x axis,stretching the spring until the block finally stops. What is the block's displacement? When the...

Homework Statement The minute hand on a watch is 2.0 cm in length. What is the displacement vector of the tip of the minute hand: a) From 8:00 to 8:20 A.M.? b) From 8:00 to 9:00 A.M.? Homework Equations N/A. The Attempt at a Solution So, first I drew a diagram of the clock and...

Homework Statement A 13 N force with a fixed orientation does work on a particle as the particle moves through displacement = (3i - 5j + 3k) m. What is the angle between the force and the displacement if the change in the particle's kinetic energy is (a) +25.6 J and (b) -25.6 J...

Homework Statement Using graphical methods as much as possible, answer the following questions: (a) What is the displacement of the object at t=6.0s? (b) What is the average velocity of the object between t=0.00s and t=6.0s? (c) What is the average speed of the object between t=0.0s and...