Displacement Definition and 999 Threads

The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight. Traditionally, various measurement rules have been in use, giving various measures in long tons. Today, metric tonnes are more commonly used.
Ship displacement varies by a vessel's degree of load, from its empty weight as designed (known as "lightweight tonnage") to its maximum load. Numerous specific terms are used to describe varying levels of load and trim, detailed below.
Ship displacement should not be confused with measurements of volume or capacity typically used for commercial vessels and measured by tonnage: net tonnage and gross tonnage.

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  1. M

    Displacement Vectors: Understand x, y, z & i, j, k

    Homework Statement DISPLACEMENT VECTORS Homework Equations r=xi+yj+zk=<x,y,z> The Attempt at a Solution For all of the problems I am starting to do class we must use the equation above. I do not understand why we use i,j,k and how they are similar to x,y,z and how to use...
  2. E

    Solve Displacement Vectors Homework

    Homework Statement Route follewed by hiker consists of displacement vectors A, B, C. Vector A is 1550 m long in a direction 25.0 N of E. Vector B is of unknown length but in a direction of 41.0 E of S. Vector C is also of unknown length but of direction 35.0 N of W. Hiker ends up where he...
  3. S

    Displacement and vector problems

    Ok, so I am having a difficult time with vectors (despite the fact that it appears to be an easy concept). My main issue is I am so focused on my AP Calc and AP English classes that I have not had much time for any studying, so I rely on what I hear during the course. I am required to complete...
  4. K

    Find displacement, time and velocity

    A rocket takes off vertically from the launchpad with no initial velocity but a constant upward acceleration of 2.25 m/s2. At 15.4 s after blastoff, the engines fail completely so the only force on the rocket from then on is the pull of gravity. (a) What is the maximum height the rocket will...
  5. T

    Calculate Displacement Between Two Oases Without a Coordinate System

    Homework Statement Starting from one oasis, a camel walks 82.021 ft in a direction 30 degrees south of west and then walks 30 km toward the north to a second oasis. Without using a coordinate system, calculate the magnitude and the direction of the displacement from the first oasis to the...
  6. T

    I'm really lost with average velocity and displacement

    Homework Statement Heather and Matthew walk with an average velocity of 0.98m/s eastward. If it takes them 34 min to walk to the store, what is their displacement? Homework Equations V avg = Δx/Δt (since I'm looking for the displacement I changed it to) Δx=V avgΔtThe Attempt at a Solution...
  7. D

    Direction of displacement vector

    I got this problem that states: A boy runs 11.3 blocks North, 5.6 blocks Northeast, and 4.7 blocks West. Determine the length of the displacement vector that goes from the starting point to his final position. I got the answer to this part. It was 15.25979798 blocks. Here is the next...
  8. D

    Direction of vector displacement

    Sorry, meant to put this in the homework forum.
  9. V

    Exploring Displacement and Average Velocity: Kinematic Equation

    This question is part of a lab report I've been working on, sorry in advance if I didn't follow all guidelines here. 1. Homework Statement Explain what the shape of the graph tells you about the mathematical relationship between displacement and average velocity. Include the kinematic equation...
  10. D

    Find Displacement of Car: Math Homework

    Homework Statement car travels 18.2km due north then 43.2km at 53 degrees west of north. Find magnitude of car's resultant displacement. b.) calculate the direction of the car's resultant displacement, measured counter-clockwise from the northerly direction.Homework Equations The Attempt at a...
  11. J

    Calculating Displacement Using Vectors and Angles

    Hey guys I'm lost with this word problem. A roller coaster moves 85m horizontally, then travels 45m at an angel of 30.0° above the horizontal. What is its displacement from its starting point? I started out by drawing a 85m line. But now I'm confused because I have to set a 30 degree angle...
  12. V

    Finding the resultant displacement vector.

    Homework Statement In order to get from her classroom too the lab without going through the crowded rotunda, Jodie walks 14m (E), 42m(S), 32m(W), 13m(S), and 9m(E). Draw a scale diagram to represent all the initial displacement vector and the resultant displacement vector in Jodie's walk to...
  13. J

    Physics-magnitude/ displacement?

    Homework Statement A truck travels 3.45 km north and then makes a 90° left turn and drives another 4.10 km. The whole trip takes 4.50 min. 1)With respect to a two-dimensional coordinate system on the surface of Earth such that the y-axis points north, what is the net displacement vector of the...
  14. J

    Vector magnitude and displacement

    Homework Statement A car is driven east for a distance of 48 km, then north for 25 km, and then in a direction 25° east of north for 28 km. Draw the vector diagram and determine the total displacement of the car from its starting point. whats the magnitude and direction(counterclockwise...
  15. J

    Find the velocity and displacement of the particle at t=t1>0

    So I have the problem: A particle of mass m is at rest at t=0. A linearly increasing force F=bt is applied. Find the velocity and displacement of the particle at t=t1>0 What exactly is bt? Can it be set equal to ma?
  16. H

    How do you find the degree of displacement?

    A girl travels 5 blocks west, 4 blocks north, then 7 blocks east. It asked to solve for the magnitude of her displacement and I got 4.472135955 blocks, which was correct. The next part of the problem however asks to "Find the direction (measured from due east, with counterclockwise positive) of...
  17. T

    Finding vertical displacement in terms of a function of two heights.

    So I've been stuck on this problem for hours, I just can't seem to put the pieces together... Homework Statement Two basketball players of equal height, (and jumping with same initial velocity, etc.) by jumping they raise their centers of mass the same distance "H". The first player (A)...
  18. L

    Why does particle displacement A increase sound pressure?

    pressure=p(x,t)=BkAsin(kx-ωt) http://www.physics.unomaha.edu/Sowell/phys2120/Lectures/Sound/Sound.pdf Surely, when loudness-intensity-pressure increases, so does the maximum displacement A of the speaker. Wrong thread title. My question is: Why increasing the maximum molecule...
  19. J

    Relation between presion wave and displacement wave

    hellow, i need you to help me with this, i need the relation between presion wave and displacement wave into an air column, i know that when you talk about presion wave, its because the wave needs a physics medium to move, but i don't know how is this in an air column, thank you.-
  20. J

    Solving for Displacement in Frictionless Plane

    Homework Statement In a frictionless plane, a block of mass M is attached to a spring initially relaxed of constant k which is attached to a wall. A piece of gum of mass m is then horizontally thrown in direction to the block with velocity v_1 hitting it at time t = 0 in a perfectly inelastic...
  21. T

    Horizontal component of the superhero’s displacement?

    1.A superhero flies 340 m from the top of a tall building at an angle of 22 ◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Answer in units of m. What is the vertical component of the super- hero’s displacement? Answer in units of m. 2...
  22. T

    Calculating Spring Displacement with Added Mass in Simple Harmonic Motion

    Homework Statement A 0.24 kg mass is suspended on a spring which stretches a distance of 5.9 cm. The mass is then pulled down an additional distance of 13.5 cm and released. What is the displacement from the equilibrium position with the mass attached (in cm) after 0.46 s? Take up to be...
  23. M

    Position sensor for sideways displacement

    I'm trying to design a position sensor for a specific application but the last time I thought about physics was a long time ago. The situation is *similar* to this : I have a block of wood with an irregularly shaped tantalum bead (diameter of about 2mm) embedded about 2-4 mm into the wood...
  24. 3

    Displacement of airplanes in opposite directions.

    An air traffic controller observes two airplanes approaching the airport. The displacement from the control tower to plane 1 is given by vector A, which has the magnitude 220km and points in a direction 32(degrees) north of west. The displacement from the control tower to plane 2 is given by...
  25. I

    How Do You Calculate Displacement Angles?

    URGENT HELP needed on Displacement Angles Due tomorrow Edit: with the help of second poster, I was able to solve it out. Btw I got 15 meters west and 11.34 meters south for the second one
  26. K

    Mechanics displacement Question

    Homework Statement At time t = 0 a drag racer starts from rest at the origin and moves along a straight line with velocity given by v = 5t^2, where v is in m/s and t in s. The expression for the displacement of the car from t = 0 to time t is (a) 5t^3 (b) 5t^3/3 (c) 10t (d) 15t^2 (e) 5t/2...
  27. P

    Force, Displacement & Stress: Is There a Connection?

    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...
  28. 8

    Load Displacement to stress strain

    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...
  29. S

    Vector components - displacement

    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...
  30. B

    Can Saggital Motion Help Estimate Frontal Displacement in Treadmill Walking?

    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...
  31. B

    Extimation of displacement in Frontal plane from sagital plane

    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...
  32. T

    Solving a Particle Displacement Problem: Find the Speed at x=2.5

    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...
  33. I

    Velocity of a particle when acceleration based on displacement

    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...
  34. O

    Displacement operator for coherent states?

    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...
  35. A

    Dicontinuity of electric displacement normal to a boundary

    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...
  36. G

    Charge displacement through a conductor

    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...
  37. M

    Displacement given coefficient of friction and 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...
  38. R

    Displacement current and conduction current

    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...
  39. Y

    What is the difference between displacement and distance?

    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...
  40. M

    Force given mass, velocity, and displacement

    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...
  41. L

    Displacement & Pythagorean Theorem: Triangle ABC

    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...
  42. L

    Is Displacement Always Positive in Two-Dimensional Space?

    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...
  43. I

    Is Displacement Zero if I End a 1-Mile Run in the Same Spot?

    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!
  44. J

    How Do You Calculate Displacement from a Unit Impulse Image?

    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
  45. r-soy

    Who I can find the displacement in this Q ?

    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...
  46. R

    How Can Bats Detect Ultrasonic Sound Waves at Extremely Low Intensities?

    Homework Statement A bat can detect ultrasonic sound waves with an intensity as low as 1 × 10–13 Wm–2. An ultrasonic source emits sounds waves with a frequency of 54.0 kHz and a power of 1 × 10–7 W. Take the speed of (ultra)sound in air as 340 ms–1 and the density of air to be 1.2 kg/m3...
  47. C

    Weight Capacity for U-Shaped Pontoons | Christopher in Louisiana

    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...
  48. B

    Sketch the displacement of the string

    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...
  49. B

    Velocity and Displacement: How to Derive Expressions from Acceleration Equation

    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...
  50. F

    Understanding Displacement Current in Charging a Capacitor

    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...
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