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. A

    What is the angular displacement of a thrown ball

    Homework Statement A ball is thrown to a man and reaches him in 60s. The ball curves because it is spinning at an average angular velocity of 330 rev/min on its way to the man's hands. What is the angular displacement of the ball Homework Equations θ=ωt The Attempt at a Solution I...
  2. F

    Radial displacement in hollow cylinders

    For an axisymmetric long tube, it is said that radial displacement is independent of axial coordinate. What is the justification for this simplification?. If u, v and w are axial , tangential and radial displacements then u=u(x,θ,r) v=v(x,θ,r) w=w(x,θ,r) Where x,θ,r are polar coordinates...
  3. N

    Intuitive, real-world explanation of displacement current?

    I know and fully understand the mathematical definition of it. But what's the physical explanation? Is it something like "preservation of current" or something?
  4. S

    Finding initial velocity given angle and horizontal displacement

    Homework Statement distance = 0.8meters angle = 55° gravity = 9.81m/s^2 \V_0 = ?, assuming that it leaves and falls back on the same horizontal plane. The attempt at a solution So we know for a fact that the initial velocity is supposed to be 2 m/s, according to the book at least. I tried...
  5. E

    Example of x0 in the kinematic equation for displacement

    In the kinematic equation x = x0 + v0 * t + .5 * a * t^2, can someone give me an example in which x0 has a value that is not zero?
  6. R

    Using displacement, velocity and acceleration oscillation equation?

    Homework Statement The function x = (4.5 m) cos[(6∏ rad/s)t + ∏/3 rad] gives the simple harmonic motion of a body. At t = 1.6 s, what are the (a) displacement, (b) velocity, (c) acceleration, and (d) phase of the motion? Also, what are the (e) frequency (in Hz) and (f) period of the...
  7. R

    Torsional oscillator with angular displacement

    1. A torsional oscillator of rotational inertia 2.1 kg·m2 and torsional constant 3.4 N·m/rad has a total energy of 5.4 J. What is its maximum angular displacement? What is its maximum angular speed? Homework Equations θ(t)=Acosωt The Attempt at a Solution still trying to...
  8. J

    Terminology in rotational kinematics: distance vs displacement

    I'm trying to learn some physics on my own, using the internet as my main source of information. Now, I'm a bit confused about some terminology, and I can't find anything about it... Distance vs displacement in rotational kinematics! Is there a similar difference as in linear kinematics...
  9. J

    Descending elevator stops determine displacement of mass on spring

    Hey guys i am very stuck any help appreciated. I do not know where to start. The equations used need to be derived from first principles and accurate free body diagrams drawn. An elevator moves downwards at a constant velocity v0. While descending, at a particular height (assuming t=0), the...
  10. I

    Sketch following displacement field

    Homework Statement calc extension shears dilatation and rotation u(sub)i= ex(sub)i ... e is constant Homework Equations The Attempt at a Solution I have no clue where to start. I am reading the textbook and can't understand how to apply it to this problem. Any help would be...
  11. MarkFL

    MHB Name102's question at Yahoo Answers regarding displacement vs. distance

    Here is the question: Here is a link to the question: The velocity function (in meters per second) for a particle moving along a line is v(t)=2t−8? - Yahoo! Answers I have posted a link there to this topic so the OP can find my response.
  12. E

    RMS displacement of a diatomic atom

    Homework Statement A hypothetical atom is diatomic containing two identical atoms separated by an equilibrium distance. About this distance the atoms vibrate with the electric forces providing an effective spring constant of k = 4.0×10^−3 N/m. As the temperature of the sample is increased the...
  13. E

    HAT - Displacement of joint of the rods

    Two rods of different materials with coefficients of linear expansion α1 and α2 respectively; Young's moduli Y1 & Y2 respectively; of initial lengths l1 and l2 respectively are joined at one end. the free ends are fixed to two vertical walls as shown in the fig. Temperature of the surrounding...
  14. N

    Potential energy of pendulum in terms of displacement.

    Hi guys, I'm having troubles finding how to write the potential energy of a 1D pendulum down. In terms of displacement however. This should be easy and it is, but my professor had this nice "clean" solution whereas mine is really dreadfull, any help? :) edit: Ok nvm guys. I was thinking I went...
  15. P

    How is work dependent on displacement rather than distance?

    Using the definition of work=force x displacement (which I understand is correct):If I push a box along the ground with force of 10N over a distance of 1m and then back again to the starting point, the above eqn would indicate I have done zero work (because displacement =0). But my muscles have...
  16. K

    How to find displacement in vector diagram?

    how to find displacement in vector diagram? My homework question states : "Mr. Hinsley walks north 252 m, east 512 m, south 35.5 m and finally west 256 m. What is the total distance traveled? What is his displacement?" I got that the total distance = 1096 m However i am having trouble...
  17. R

    Is the Displacement Operator Tψ(x)=ψ(x+a) Hermitian?

    Consider the displacement operator Tψ(x)=ψ(x+a). Is T Hermitian?
  18. A

    Two projectiles, displacement vs. time

    A ball is thrown upward with an initial speed, vo. When it reaches the top of its flight, at a height h, a second ball is thrown at the same initial velocity. sketch a displacement vs time graph for both balls. where do the balls cross from the graph. Find the height where the paths cross...
  19. Sneakatone

    How to find magnitude of initial displacement?

    A mass of 130 g is held by a horizontal spring constant 22 N/m. It is displaced from its equilibrium position and released from the rest. As it passes through its equilibrium position, its speed is 4.2 m/s. a) find work done on the spring. w=1/2mv^2 1/2(.13kg)(4.2)^2= 1.14 (correct) b)...
  20. F

    Deriving the Wein displacement law

    I am not really sure where to go from here, since T varies. I am guessing this means I am approaching the problem incorrectly, but in that case, I have no idea how to do it. Any help/guidance would be appreciated.
  21. S

    Motion in a Plane-Finding velocity and displacement

    Homework Statement A helium-filled balloon rises straight up, at a rate of 0.7m/s, for a distance of 20m before it pops. A steady breeze of 1.5m/s due east blows against the balloon. a) What is the velocity of the balloon relative to the ground? b)How long does the balloon rise before...
  22. J

    Simple displacement and acceleration question

    Homework Statement Find the body's displacement and average velocity for the given time interval. s=t^2 -3t +2, 0<=t<=2 Homework Equations d(displacement)/d(time) is for the acceleration right? The Attempt at a Solution So here is my problem. I got 2t-3 for the...
  23. N

    What is the conceptual interpretation of the integral of displacement?

    I know derivative of displacement gives you velocity, and dv/dt=a. And I know the integral of a is v and the integral of v is x. So what's the integral of displacement give you conceptually?
  24. T

    Displacement Calculations for Canadian and Norwegian Skiers

    Homework Statement Homework Equations Not sure about this? (this is what I am confused about) The Attempt at a Solution No attempt :(
  25. A

    Calculate when displacement are equal

    Homework Statement One stone is dropped from the the top of a tall cliff, and a second stone with the same mass is thrown vertically from the same cliff with a velocity of 10.0 m/s [down], 0.50seconds after the first. Calculate the distance below the top of the cliff at which the second...
  26. CivilSigma

    Velocity-time & displacement time graphs

    I am starting to panic... How do you find the average velocity from a Velocity-time graph. The graph has a slope of 0.75 and starts at (0,6) and ends at (8,12) I calculated V.avg = 9. (( 6+ 12)*0.5) but the answer sheet says 12? How? And, in general how do you find the acceleration from a...
  27. trollcast

    Displacement v Time graph for a wave

    Homework Statement I'm given a graph with displacement in metres on the y-axis and time on the x-axis. The graph represents the displace of a particle of a spring that has a mechanical wave passing through it The graph is just a simple sine wave. It then asks to describe the...
  28. A

    Capacitor and displacement current.

    Homework Statement a capacitor of capacitance 'C' is being charged across a dc source with an ammeter . will the ammeter show a momentary deflection during the process of charging? if so, how would it and the resulting continuity of current in the circuit be explained ? Homework Equations...
  29. H

    Initial displacement in Simple Harmonic Motion

    Homework Statement A meterstick is clamped to a tabletop. The end of the meter stick is deflected downwards a small distance x and is released such the end of the meterstick moves up and down in simple harmonic motion. The meterstick is measured to oscillate up and down 10 times in 5.0...
  30. Sneakatone

    Questions on 3d displacement vectors

    A room measures 4 m in the x direction, 5 m in the y direction , and 3 m in the z direction. A lizard crawls along the walls from one corner of the room to the diametrically opposite corner. If the starting point is the origin of coordinates, what is the displacement vector in terms of unit...
  31. C

    Equation for displacement in damped harmonic motion.

    This is not really a homework problem but rather a question about an equation for displacement in damped harmonic oscillations that I've come across during revision for midterms. In my notes and in various textbooks the equation is given as x=C\mathrm{exp}(-\frac{b}{2m}t)\cdot\mathrm{exp}(\pm...
  32. M

    Displacement current inside spherical capacitor

    You have a spherical capacitor with inner conductor radius a and outer conductor with radius b. The capacitor is filled with a perfect homogeneous dielectric of permittivity ε and is connected to a low-frequency time-harmonic voltage v(t)=V_{0}cos(ωt). Find the displacement current density...
  33. B

    Integral for displacement from velocity

    Homework Statement An object is moving with a velocity by the equation v(t) = [(3/2)(m/s2)t] i^ + [(3/2)(m/s3)t2] j^ What is the magnitude of displacement during 0 - 2sHomework Equations v(t) = [(3/2)(m/s2)t] i^ + [(3/2)(m/s3)t2] j^ The Attempt at a Solution (3/2) ∫ from 0 to 2 [(t2 / 2)...
  34. B

    2D Vectors - Addition and Subtraction of Successive Displacement Vectors

    The figure shows the successive displacements of an aircraft flying a search pattern. The initial position of the aircraft is P and the final position is P'. What is the net displacement (magnitude and direction) between P and P'? My attempt: So, my understanding is that the net...
  35. F

    Finding velocity and displacement at any time during uniform acceleration motion

    Was not sure whether to post this here on the general forums, as it does kind o relate to coursework, just not directly. The four equations of uniform accelerated motion. Can you use them to find the velocity and displacement at any specific time by simply just using 't' as the time you are...
  36. B

    Sound intensity and relationship to pressure and displacement

    Homework Statement The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20 degC. At a distance of 4.80m from the trumpet, the sound intensity level is 47.0dB. The frequency is 576Hz. Also knowing speed of sound in air is 344m/s, the density is 1.20kg/m^3...
  37. P

    Max horizontal displacement of a projectile

    Homework Statement A catapult is capable of firing a projectile with a velocity of 25 m/s, the catapult is surrounded by a wall of height 20.4 m what is the maximum distance measured from the wall, that the catapult projectiles are capable of hitting? Homework Equations...
  38. S

    Work, force and displacement directions

    Hi guys! I stumbled upon this truly weird question that seems counter intuitive to me. For the purpose of this question, I'll use x,y,z as unit vectors without the roof because I'm using my phone now.. If F= 160N x - 40N y and s= 14m x +11m y (as stated in the question) is this physically...
  39. A

    Comparison of two engines of the same displacement

    Hi all, I have this question, and hope you could help me to solve. There are two engines with the same displacement (say 250cc). One with smaller piston and the other bigger. Of course the first one will move longer. If everything else is the same or similar, generally, which engine is...
  40. S

    What is the relationship between velocity and displacement in a falling object?

    Just worked through the "ball-falls-off-a-cliff" problem and was curious as why the equation tan \theta = \frac{vy}{vx} is used to find the angle at which the ball strikes the ground versus tan \theta = \frac{sy}{sx} Homework Statement Homework Equations The Attempt at a Solution
  41. I

    Calculating Displacement with Friction and Air Resistance

    Homework Statement A car is rolling down a hill, it has a velocity of 54.22m/sec at the bottom of the hill. When it reaches the bottom of the hill, a fan begins to blow on it causing a drag force of 250N. Also, the tires create a friction coefficient of .1. The car eventually stops due to...
  42. J

    Calculate Muzzle Velocity: Angle, Height, Horizontal Displacement

    I need help with my hw, bad. I've been screwing off in my physics class for awhile and I can't get afterschool help because I have sports. I need to pick my grade up in this class to keep playing...so here I am. I need a good walkthrough badly, i don't know a whole lot with physics, but a decent...
  43. L

    Angular acceleration and displacement problem

    I've listed the whole problem because I know I'll have more questions, but all I want to know atm is whether I'm plugging the right values into the equation. Thanks in advance for your help. Homework Statement A compact disc speeds up uniformly from rest to 5200rpm in 620rad. The disc’s...
  44. N

    Help with motion of the car - Displacement

    Hi all, I am writing a code for the Ultra Sonic Sensor for the car which will show if there is enough parking space for the car to park parallel. Basically, the UltraSonicSensor starts recording values when the distance from the side of the car to some object is greater than the car width...
  45. S

    Graphically determine resultant vector displacement

    Homework Statement Graphically determine the resultant of the following three vector displacements: 1) 24m, 30 degrees North of East 2) 28m, 37 degrees East of North 3) 20m, 50 degrees South of West Homework Equations The Attempt at a Solution I have the vectors drawn but I...
  46. M

    Ether Synthesis by Sn2 displacement

    Hello, I am doing an experiment in which I will have a halophenol, and with KOH in ethanol and an alkyl tosylate, I will need to create an ether. The first step is to add the KOH and alkyl tosylate, and I should almost have an ether (ring with halogen attached to it and an OR hanging off...
  47. M

    What Will Happen to Earth's Landmass When All Land Erodes into Mineral Dust?

    So hypothetically...In the future...When all "dry" land has eroded into mineral dust...And volcanic activity is slower...being that 71% of the surface is water... Will this planet become waterworld with a few ice islands as a product of displacement? Any thought to the final settling of the...
  48. M

    What does phase of the motion in terms of cosine displacement mean?

    What does "phase of the motion in terms of cosine displacement" mean? I'm getting tripped up on the wording of this homework question. Homework Statement Measured acceleration: An accelerometer has measured the simple harmonic motion shown in the image below. Homework Equations You...
  49. V

    Rolling ramp displacement due to weigh of block

    Homework Statement Basically there's a ramp; its inclined plane has length "a", the base has length "b" and its height has length "c". The ramp is stationary, but it has wheels under it. The ramp weighs 120N. The center of mass of the ramp is located at 2/3 of "b" on the horizontal axis...
  50. J

    Converting a DISPLACEMENT vector in Cartesian to Cylindrical Corrdinates

    Hi all, I was wondering how would one go about converting a displacement vector in cartesian coordinates to cylindrical. I am getting a bit confused on how to deal with the unit vectors; converting a point in space is a simple task, but when it's a vector it just confuses me. I am specifically...
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