What is Spring: Definition and 999 Discussions

SPRING is a freeware GIS and remote sensing image processing system with an object-oriented data model which provides for the integration of raster and vector data representations in a single environment. It has Windows and Linux versions and provides a comprehensive set of functions, including tools for Satellite Image Processing, Digital Terrain Modeling, Spatial Analysis, Geostatistics, Spatial Statistics, Spatial Databases and Map Management.
SPRING is a product of Brazilian National Institute for Space Research (INPE), who is developing SPRING since 1992, and has required over 200 man-years of development and
includes extensive documentation, tutorials and examples. More than 70,000 users from 60 countries have downloaded the software, as of January 2007.

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  1. S

    Block on Spring SHM, Finding angular frequency

    Homework Statement An "ideal" spring with spring constant 0.45 N/m is attached to a block with mass 0.9 kg on one end and a vertical wall on the other. The floor has negligible friction, and you give the block a push and then let go. You observe that the block undergoes simple harmonic motion...
  2. T

    Sound & Music, Mass on a spring

    Homework Statement I have a mass of 100 g and I want to make it oscillate with a period of 10 Hz. What spring stiffness do I need? Homework Equations f = 1/2π√s/m The Attempt at a Solution I don't know how to find the stiffness to plug into the equation.
  3. G

    Spring problem using work energy theorem

    Homework Statement A 2.90 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0360 m . The spring has force constant 860 N/m . The coefficient of kinetic friction between the floor and the block is 0.35 . The block and spring are released from rest...
  4. Drakkith

    How Does Damping Affect the Dynamics of a Spring System?

    Homework Statement Consider the illustration of 3 springs: In A, we hang a very light spring and pan from a hinge. The pan and spring are so light, we can neglect any stretching of the original length ##l_{0}##. In B we add a weight ##mg## which force is balanced by ##kl## (Hooke's Law; the...
  5. Ameya Darshan

    Extension in a Spring: Which Mass Causes Greater Extension?

    Homework Statement Scenario: a block of mass 5 kg is hanging from a spring from an ideal pulley from one side, the other side supporting a mass of 10 kg through a STRING. Now, the 10 kg block replaced with a 5 kg block. In which case would the extension in spring be greater, assuming constant...
  6. Nacho Verdugo

    Mass sliding on frictionless inclined plane compresses a spring

    Homework Statement A body with mass m start from repose and slide along a plane without friction. The plane forms an angle with the horizontal. After sliding a distance d unknown, the mass touches the extremity of a spring non compressed and non stretched with no mass. The mass slides a...
  7. N

    Equations of motion for disk and spring system

    Homework Statement Thin uniform disk with radius r, mass m, and moment of inertia 0.5mr2 is suspended from a cable line where one end is attached to a set point via a spring, and the other end is also attached to a spring but is moving in an upwards direction. Solve for the equations of motion...
  8. RavenBlackwolf

    Conservation of Energy, Down an Incline with a Spring

    Homework Statement A 4.0 kg block starts at rest and slides a distance d down a frictionless 35.0 incline, where it runs into a spring. The block slides an additional 16.0 cm before it is brought to rest momentarily by compressing the spring, whose spring constant is 429...
  9. J

    Calculating the Spring Constant from Force-Extension Graph

    Homework Statement Force Extension in (m) 1.0 0.014. 1.5 0.032. 2.0 0.053. 2.5 0.071. 3.0 0.090. 3.5 0.110. 4.0 0.130. 4.5 0.148. 5.0 0.166...
  10. R

    Tension, Spring and Moments of Inertia

    Homework Statement A given pulley has a radius of 20 cm and moment of inertia 0.2 kgm2. The string going over it is attached to a vertical spring of spring constant 50 N/m on one end and a 1 kg mass on the other end. The system is released from rest with the spring at natural length. Find the...
  11. X

    How do energy conversions in a spring work during one complete oscillation?

    Hi, I'm having trouble understanding the energy conversions in a spring. I know that whilst a spring is being deformed, it gains elastic potential energy and at maximum deformation it has max elastic potential energy. But, does a spring have maximum kinetic energy at its un-deformed state? if...
  12. S

    Air-Track Carts & Spring (Energy)

    Homework Statement The air-track carts in the figure(Figure 1) are sliding to the right at 2.0 m/s. The spring between them has a spring constant of 140 N/m and is compressed 4.1 cm. The carts slide past a flame that burns through the string holding them together. What is the final speed of...
  13. J

    Spring set makes up a traveling wave

    Homework Statement Twelve identical mass-spring combos are lined up and set to oscillation. Two pictures of the same system taken at different times are shown. The crest-to-crest distance is 8.0 cm, and the maximum displacement of all the masses is 1.5 cm. 1) Explain how you can tell that a...
  14. B

    Solving Preloaded Springs w/ Mass: Can Force Overcome Preload?

    Quick question that's causing a lot of headaches at the moment. Ive got two horizontal springs with a mass in the middle. The springs are preloaded. I get that the springs are in parallel and the effective stiffness is the sum of the stiffnessess. If the springs are preloaded, is the preload...
  15. R

    Problem with spring -- ansys APDL

    Hi, could you help me with my parametric model please? I have a problem with the end of spring. At the end of load (displacement) is problem with solve stress because there is concentrated stress and it shouldn't be. I didn't define contact between coils yet. I need to repair this fail at...
  16. M

    Spring Energy System: Finding Total Energy with User-Selected Position (x,y)

    Homework Statement The picture is too tough to draw online, so I've attached a picture of it. The illustrated mechanism shows two springs both with a known spring constant ##k## and rest length of ##2R##. One end of the top spring is fixed above a wheel and the other end is attached to the...
  17. MacLaddy

    Tension/compression spring thing

    Hello folks, I'm trying to find a spring that can act in both tension and compression, and return to a neutral (or zero) location when released. What I'm thinking of is basically a shock, but without the damper. It needs to be a nearly instantaneous return. Google search is giving me nothing...
  18. H

    6D calculation of spring-forces/moments

    Hi, I'm a student in electrical engineering and I'm writing my master thesis at the moment. Ironically I'm now confronted with the deformation of springs. I'm not a physics (!) but I think and hope that you may can help me. Simple push and pull forces are not the problem. I need to calculate...
  19. W

    Two Identical Pendulums Connected by a Light Spring

    Homework Statement Two identical pendulums of the same mass m are connected by a light spring. The displacements of the two masses are given, respectively, by xa = Acos( (w2-w1)t/2 )cos( (w2 + w1)t/2 ), xb = Asin( (w2-w1)t/2 )sin( (w2 + w1)t/2 ). Assume that the sprint is sufficiently weak...
  20. N

    Equations of Motion w/ spring scale

    Homework Statement http://imgur.com/a/X7mWA Homework Equations 1. ΣF = m a 2. Στ = Iθ" The Attempt at a Solution First , assuming small motion, all movement of the scale can disregard x components (so the spring stretches only in vertical direction without an impact from the x directional...
  21. A

    Extension of spring Lagrangian

    Homework Statement An ideal spring of relaxed length l and spring constant k is attached to two blocks, A and B of mass M and m respectively. A velocity u is imparted to block B. Find the length of the spring when B comes to rest. Homework Equations ∆K + ∆U = 0 U = \frac {kx^2}{2} ∆p = 0...
  22. broncoracer104

    Automotive Kayak Loader Design Help Needed: Spring Placement/Weight

    hello, new here but need a hand figuring out a problem that is above my knowledge, i am currently building a kayak loader for myself like the one pictured below, i am trying to figure out where to place the spring and how heavy of a spring i need to help assist the kayak onto my roof, i am sure...
  23. I

    I Calculating Work Needed to Stretch a Spring: 100J to 0.75m

    "It takes 100J of work to stretch a spring 0.5m from its equilibrium position. How much work is needed to stretch it an additional 0.75m." Attempt: w = ⌠abF(x)dx work = F x D 100J = F x 0.5m F = 200J 0.75 + 0.5 = 1.25 w = ⌠0.51.25 200dx w = 150 J The correct answer: w = 525 J what did I do...
  24. AsadaShino92

    Potential energy of a displaced mass on a spring

    Homework Statement A spring of negligible mass exerts a restoring force on a point mass M given by F(x)= (-k1x)+(k2x^2) where k1 and k2 >0. Calculate the potential energy U(x) stored in the spring for a displacement x. Take U=0 at x=0. Homework Equations ΔU=∫F(x)dx U=½kx^2 The Attempt at a...
  25. R

    Understanding the Relationship between Spring Constant and Energy

    Homework Statement Homework EquationsThe Attempt at a Solution EPE is (0.5)kx^2 Let Y have spring constant of K then X has spring constant of 2K So EPE of Y is (0.50kx^2 which is E So EPE of X must be (0.5)2kx^2 which is kx^2 which is 2E? But correct answer is E/2??
  26. J

    Mech#3 on 1974 AP "C" Exam -- 2 Blocks Connected by a Spring

    Homework Statement A system of two blocks (each of mass M) are connected by a spring with spring constant k. The system is shoved to the left against a wall and the spring is compressed a distance D. The block(s) are then released. Determine the period of oscillation for the system when the...
  27. S

    Looking for locking spring mechanism for cassette-like application

    Hi, I want to apologize in advance because I have not studied mechanical engineering in any profound sense other than in my hobbyist projects (I focus more on software engineering). Currently I am creating a real life Raspberry Pip Boy 3000 MK 4 from the Fallout 4 video game with instead of...
  28. R

    Solve Spring Gun Problem: Recoil Speed Calculation

    Homework Statement A mechanical gun of mass M(g) uses a spring to shoot a bullet of mass M(b). The energy of the compressed spring before firing is E. Assuming the gun is at rest before firing, what is the recoil speed of the gun immediately after it shoots the bullet? Homework Equations...
  29. R

    Masses connected to spring momentum

    Homework Statement An m = 1.3 kg block and an M = 3.0 kg block have a spring compressed between them and rest on a frictionless table. With a stopper in place that prevents m from moving, the spring is compressed and released so that M moves away with a speed 2.0 m/s. The spring is...
  30. M

    A spring with a force constant

    Homework Statement Homework Equations These are the equations he provided. The Attempt at a Solution I actually have no idea how to do them. So any help would be much appreciated.
  31. A

    2 discs connected by spring, airborne?

    Homework Statement 2 identical discs each mass m are connected to stiff spring with constant k. when you push down on the top disc and release, will the system be able to lift off ground. if so, how high? Homework Equations f=ma,f=kx,pe=mgh,pe=1/2kxsquared, ke=1/2mvsquared The Attempt at a...
  32. A

    Two discs connected by a stiff spring

    two identical discs are connected by a stiff spring. if you push down on the top disc then release, will the system be capable of leaving the ground? if so, how high? what exactly is the spring doing (in terms of pushing or pulling on either disc) during the motion? what force(s) cause the...
  33. R

    Potential energy of the spring

    A planar object comprises of two masses joined by a linear spring with relaxed length p. The horizontal and the vertical displacements of the two masses are measured relative to a fixed point of reference as shown in the figure. What would be the potential energy of the spring? My initial guess...
  34. Andrea Vironda

    Spring Displacement in Moving Part: Constant Pressure?

    hello, I'm new here according to this scheme: i would to know, if the pressure is constant, the spring displacement in the moving part in function of time. the square is without mass, so i thought to use the energy approach, but i don't know how to consider acceleration
  35. A

    Force Analysis of a compressed spring

    Hi all, I am quite confused by the forces relating to a horizontlly placed spring when someone directly exerts a force to the compress it. If I exert a force F to the right to compress the spring, which, say, is placed against a wall, the spring exerts an elastic force on me but I don't see how...
  36. E

    What distance is needed for a body to spin in circular motion with a spring?

    Homework Statement http://[URL=http://www.siz.co.il/][PLAIN]http://up416.siz.co.il/up3/w2jymjm5nqxy.png [/B] A body with a mass that equals to m is inside a smooth tube and is attached to two identical springs with constants that equal to k. Their length when they are limp is L0. When the...
  37. ikihi

    Building a Clock from a Spring: Exploring Potential Energy

    Homework Statement You are in a spaceship far from any other objects, and you want to build a clock. You decide to build your clock out of a spring with a mass attached to it. You use a spring with spring constant k = 138 N/m, and you initially displace the mass a distance x=25.0 cm from...
  38. S

    Approximating a spring constant for an air leg

    Hi all, In short: For an air leg or air spring, there is a method using a Taylor approximation to find the spring constant for very small displacements, but I can't seem to figure out how it works. I've learned that air legs don't follow Hooke's law very much at all, except for when the...
  39. 1

    Lagrangian of 2 rotating masses on a spring, sliding down plane

    Homework Statement 2 masses are connected by a spring. They are on a frictionless plane inclined relative to the horizontal by ##\alpha##. The masses are free to slide, rotate about their center of mass, and oscillate. 1. Find the Lagrangian as a sum of the Lagrangian for the COM motion and a...
  40. A

    Potential energy in a Mass spring system

    Why is the rate of change of potential energy always same the rate of change of kinetic energy in a mass spring system? Additiinally, How do we determine the rate of change of potential energy in such case?
  41. A

    Energy changes in mass spring system

    Why is the kinetic energy vs time curve of a mass spring system is just a modulus of respective velocity time curve. How can we prove it mathematically ?
  42. A

    Does a perfect spring oscillate forever in gravity?

    Suppose you have a perfect spring. By that I mean a spring that experiences no friction whatsoever, even internal, and that there is no elastic limit. Thus it obeys Hooke's law perfectly. Its own weight is negligible, and there is a point mass attached to the end of the spring. Now, the spring...
  43. surya teja saithana

    Torsional spring and maximum velocity of wheel

    Moderator's Note: HOMEWORK POSTED IN WRONG THREAD, SO NO TEMPLATE Thread title changed to make it descriptive of the problem. can i solve this question using energy conservation method as shown.
  44. L

    Two Springs & Hooke's Law: Effect on Elastic Electrical Lead

    So I am doing tensile testing on an elastic electrical lead for biomedical purposes. The lead is encapsulated in an elastic tubing. Now the lead acts like a weak spring itself (coiled wire). I'm curious, if there are two springs with different k constants "within" each-other (one inside the...
  45. U

    A 342-g mass is attach to a spring and undergoes SHM.

    Homework Statement A 342-g mass is attach to a spring and undergoes SHM. Its max accelerations is 18.6m/s^2 Its max velocity is 1.75m/s Homework Equations x(t)=Acos(wt) x'(t)=-wAsin(wt) x''(t)=-w^2Acos(wt) w=sqrt(k/m) The Attempt at a Solution I essentially derived these equations and have...
  46. T

    Work / Energy Elevator / Spring Problem

    Homework Statement In a "worst-case" design scenario, a 2000-kg elevator with broken cables is falling at 4.00 m/s when it first contacts a cushioning spring at the bottom of the shaft. The spring is supposed to stop the elevator, compressing 2.00 m as it does so. During the motion a safety...
  47. mattyboson12

    Material selection for vehicle leaf spring

    Homework Statement I've gone though a material selection process to pick the optimum material for a rear leaf spring suspension for a vehicle (~700mm long) and I've selected the top 10 materials based on fatigue, fracture, toughness, cost, yield etc: -Stainless steel, martensitic, AISI 440B...
  48. M

    I Stretched spring and change in mass

    I came across with this question in my work. A stretched spring has greater energy and therefore greater mass than an unstretched spring. What's the mass increase when you stretch a spring with 500N/m by 40cm? My question is How mass can increase with stretching of the spring? As per...
  49. Hoophy

    Summing the forces for an object hanging from a spring.

    Homework Statement "A 1.50 kg object hangs motionless from a spring with a force constant of k = 250 N/m. How far is the spring stretched from its equilibrium length?" Homework Equations F = -kx W = mg The teacher said to call the force the spring pulls up with FT. The Attempt at a Solution...
  50. J

    Solve Masses on a Spring: Compression Distance D vs d

    Homework Statement When a mass m sits at rest on a spring, the spring is compressed by a distance d from its undeformed length. Supposed instead that the mass is released from rest when it barely touches the undeformed spring. Find the distance D that the spring is compressed before it is...
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