What is Spring: Definition and 999 Discussions

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  1. B

    Kinetic Energy from a Simple Harmonic motion and spring

    Homework Statement A 0.26-kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 190 N/m. The block is pulled from its equilibrium position at x = 0.00 m to a displacement x = +0.080 m and is released from rest. The block then executes...
  2. Kloud

    Spring compression after bullet passes through block

    Homework Statement Its in the screenshot i took. I need someone to walk me through the process of solving this problem because I do not understand how to get the maximum compression distance x of the spring. I know that the momentum of the billet will= the momentum of the block. Homework...
  3. A

    Two blocks connected with spring and pulley

    Homework Statement A block of mass m1= 20.0kg connected to a block of mass m2 =30.0 kg by a massless string that passes over a light, frictionless pulley. The 30.0-kg block is connected to a spring that has negligible mass and a force constant of k =250 N/m as shown in Figure P8.64. The spring...
  4. T

    What is the equation for Cp in terms of R for an adiabatic charging process?

    Hi guys, i just discovered this forum and this is my first post so apologies if i made any mistake with the how I am suppose to structure a thread. but nontheless any help would be greatly appreciated! cheers 1. Homework Statement 4. A 250mm diameter insulated cylinder (see figure below) is...
  5. F

    Spring transferring half its energy to each mass?

    My question is: Does a spring between two differing masses, each with an initial momentum of zero, transfer half of its stored elastic potential energy to each? My intuition says yes. But it seems to not be the case. If you apply the conservation of energy and momentum, the answer you get is...
  6. P

    Torsion constant of a bent spring

    How do I find torsion constant (Kt) of a spring which is bent, as shown in the image below
  7. M

    Pendulum & Spring Equation of Motion

    Homework Statement I have to derive equation of motion for this system. I want to use a moment of force, but i have a problem with moment of force spring. Homework Equations The Attempt at a Solution What I've done is: M(Fg)=-mgLsinα M(N)=0 M(Fb)=mω^2 Lsinα*Lcosα mL^2*α''=ΣM M(Fs)=?
  8. C

    Lagrangian mechanics: Bar connected to a spring

    Homework Statement Mass 1 can slide on a vertical rod under the influence of a constant gravitational force and and is connected to the rod via a spring with the spring konstant k and rest length 0. A mass 2 is connected to mass 1 via a rod of length L (forms a 90 degree angel with the first...
  9. V

    (Special relativity) Two masses connected by spring

    Homework Statement Hi all--humanist here. Now that the semester is over, I am taking the opportunity to (attempt to) self-study introductory SR. This is problem 12 in chapter 1 of Special Relativity by AP French. (1-12) A body of mass m1+Δm is connected to a body of mass m2-Δm by a spring of...
  10. B

    Spring Pendulum - Lagrangian Mechanics

    Homework Statement Please see attached image :) Homework Equations Euler-Lagrange Equation \frac{\partial{L}}{\partial{q}} - \frac{d}{dt}\frac{\partial{L}}{\partial{\dot{q}}} = 0 L = T - V The Attempt at a Solution a. The potential energy V is the potential energy from the spring and the...
  11. O

    Why is a spring a conservative force?

    Let's say you are holding a bowling ball in the air, and there is a spring on the ground directly below it. You drop the bowling ball and it lands on the spring, compressing it, and then the bowling ball rolls off the spring onto a point P right next to the spring. Wouldn't this do a different...
  12. R

    Energy conversion in a spring SHM

    Homework Statement Looking for some feedback a) Describe the energy conversions in a spring undergoing simple harmonic motion as it moves from the point of maximum compression to maximum stretch in a frictionless envoirnment. Be sure to point out the points at which there will be I) maximum...
  13. JulienB

    Pendulum on a horizontal spring (Lagrangian)

    Homework Statement Hi everybody! I'm back with another lagrangian problem :) Although I think (or hope) I have made progress on the topic, I always learn a lot by posting here! A pendulum with point-shaped mass ##m_1## hangs on a massless string of length ##l##. The suspension point (also a...
  14. James Ray

    Time taken for a mass on the end of a spring to hit a wall

    Homework Statement Homework Equations The Attempt at a Solution [/B]
  15. James Ray

    Two masses on each end of a spring lying horizontally

    Homework Statement Homework Equations T= 2*pi*sqrt(m/k) U=1/2*k*x^2 The Attempt at a Solution https://www.physicsforums.com/attachments/100892, [/B]
  16. T

    Vertical Spring with a Rod: How to Calculate Rotational Kinetic Energy?

    Homework Statement Question 8 Homework Equations E=(kx^2)/2 E=(Iw^2)/2 I=(ml^2)/3 The Attempt at a Solution I don't know how to start to solve the problem, because I don't really know which part should I refer to. First I use the energy. So the energy stored in the spring will converted to...
  17. Mouadys

    Hooke's Law: Spring Force Negative?

    Hello, Following Hooke's law, the force applied by a string on an object attached to one of its ends is F = -kx But here is my question : if we consider the equilibrium coordinate x=0 of a horizontal string, and the string is stretched until its end reaches a coordinate x1>0. By applying hooke's...
  18. terryds

    Amplitude of spring after collision

    Homework Statement A block with mass m which is on a slippery floor is attached to a spring with spring constant k. Another block which mass is also m approach and then hit the first block with velocity v as shown in the figure. After the collision, both blocks stick together and together...
  19. R

    Force vs Position Spring Graph Discrepancy Question

    I oscillated a spring attached to a force sensor above a position sensor. The position and force sensors were zeroed at the spring's equilibrium. The graph below was my result. I'm wondering as to why the graph isn't a perfect line. It makes sense that the force applied on the force sensor would...
  20. R

    Finding the Spring Constant: Angular Velocity vs Hooke's Law

    So I'm doing an experiment where I am using five different methods to find the spring constant of a spring. These three values of k should be the same but alas, they are not :( and I am at a loss as to why. The first method was by using hooke's law and finding the displacement and graphing the...
  21. terryds

    Extension of spring pulled at both ends

    Homework Statement A spring with spring constant 50 N/m is pulled with 10 N force at both ends of the spring. So, the extension of spring length is.. A. 0.0 m B. 0.1 m C. 0.2 m D. 0.3 m E. 0.4 m Homework Equations F = k Δx The Attempt at a Solution F = 10 N <--- 0000000000000000000000...
  22. D

    What is the spring constant of the spring?

    A block with mass m =7.1 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.23 m. While at this equilibrium position, the mass is then given an initial push downward at v = 4.5 m/s. The block oscillates on the spring without friction. 1)What is the...
  23. Q

    Speed due to release of spring

    Homework Statement I have run across another problem while reviewing for finals that I am not able to really understand, and this one I have no clue how to approach. I am given that a block is of mass 1 kg, it is placed on a spring of constant 500 N/m at the bottom of a frictionless plane...
  24. RoboNerd

    Potential energy in stretched spring

    Homework Statement Five identical masses of mass M are suspended by a spring stretched a distance of L. If three of the masses are removed, what is the potential energy stored in the spring? 1) (4 / 25) * M * g * L 2) (2 / 5) M * g * L^2 3) (5 / 2) * M g * L 4) (4 / 25 ) * M * g L^2 5) 5 * M *...
  25. V

    Stable equilibrium of a 4 mass, 6 spring system

    Homework Statement I am making a physics engine for my computer science class and couldn't figure out how to get the spring/mass system to come to equilibrium into a box-like shape such as the one on the left. I can understand why the one on the right is in equilibrium but I don't know how to...
  26. J

    Need help for question about spring oscillation

    Homework Statement I want to know why the answer is C not B. Thanks. Homework Equations F=kx The Attempt at a Solution
  27. B

    What Went Wrong with Calculating Spring Force in This Physics Problem?

    Homework Statement A 5.3kg mass hangs vertically from a spring with spring constant 720N/m. The mass is lifted upward and released. Calculate the force and acceleration the mass when the spring is compressed by 0.36m. Note: I already solved for acceleration and I got the correct answer-...
  28. Evangeline101

    Maximum height of a spring toy

    Homework Statement A spring toy is launched from the ground at 2.3 m/s at an angle of 78° to the ground. What is the maximum height reached by the spring toy? Homework Equations Δ[/B]dv = v1Δt + 1/2aΔt2The Attempt at a Solution [/B] Calculate time: Δt = 2.3 m/s / 9.8m/s2 = 0.23 s Now...
  29. R

    Determine the compression in the spring

    Homework Statement A 1.2 kg glider moving at 3.0 m/s right undergoes an elastic head-on collision with a glider of equal mass...
  30. ramialsaiad

    How to calculate the potential energy of a spring?

    Hi I want to calculate the potential energy of the following figure in function of x Here is my attempt : mgx + 1/2*k*(sqrt(x^2+L^2)-L)=1/2*m*v^2 Is that correct ? thanks
  31. K

    2 masses, friction and a spring

    Homework Statement Box B has initial velocity v0 and collides plastically but without clinging to mass A which is at rest. The spring, initially, is loose. assume that the collision time is very short. What's the boxes's velocity immediately after the collision? At what distance from the wall...
  32. T

    Finding force needed for spring to balance load

    Homework Statement I am given a tool that needs to be balanced in the horizontal position with a spring of my design. I need to know the force that the spring will need to exert in order to do this. I am also choosing the mount point, which will be at 10 in. Homework Equations Fsy =...
  33. D

    Firefighter sliding down pole onto spring

    Homework Statement A 80.5 kg firefighter slides down a pole while a constant frictional force of 300 N retards her motion. A horizontal 20.0 kg platform is supported by a spring at the bottom of the pole to cushion the fall. The firefighter starts from rest 3.25 m above the platform, and the...
  34. H

    Combined Spring Forces in Preloaded System with Moving Mass

    Homework Statement The mass is able to move in any direction. All springs are preloaded (compressed) to half their allowable loading capacity. Springs are not properly connected to the mass or ground (they are mounted on a rod on which the mass is moving). Ignoring all friction and gravity...
  35. R

    Designing a driven spring mass system for school project

    Homework Statement I have a math project due in a month. The topic i chose to present was second order differential equations, so i felt like making a driven spring mass system to demonstrate resonance and nice things like that. I have a few questions about materials and design and such and...
  36. J

    MHB Damped spring differental equation

    Afternoon All I have a math question I don't actually have a clue what to do. Can some help me out. A mass M is suspended vertically by a damped spring of length L and stiffness k such that the distance x between the centre of the mass and the top of the springis given by M (d^2 x)/(dt^2...
  37. S

    Spring stretch - Do I use Force or Potential Energy

    I have read posts about this but still don't have a good handle on it. I am confused about something that I know is simple. If a mass is attached to a spring, the spring will stretch according to Hooke,s law, correct? So won't the weight, (mg) balance out the spring force of -kx? So in other...
  38. M

    Finding the Value of Acceleration Due to Gravity: Using Graphs and Equations

    Hello everyone, I did an experiment titled 'mass on a spiral spring' in order to find the value for the acceleration due to gravity. The experiment consists of two parts. In the first part of this experiment, I just measured the oscillation period of a spring as a suspended mass and plotted...
  39. Z

    Finding mass of an object on a spring, given Frequency

    Homework Statement A mass m at the end of a spring oscillates with a frequency of 0.84 Hz . When an additional 730 g mass is added to m, the frequency is 0.65 Hz . Homework Equations f*2pi = w w = (k/m)^1/2 f = (1/2pi)*(k/m)^1/2 The Attempt at a Solution I simply used the third equation...
  40. R

    Maximum acceleration of a spring

    Homework Statement A spring with a spring constant of 5.0 N/m has a 0.25 kg box attached to one end such that the box is hanging down from the string at rest. The box is then pulled down another 14 cm from its rest position. Calculate the maximum height, the maximum speed, and the maximum...
  41. B

    Solving Spring System with RK4: Step-by-Step Guide

    I'm not sure if this is the appropriate place, but I've just been searching, with no luck, on how to solve a spring system with RK4 (hence the math section, since it's a Runge Kutta question). How would you set it up to change position based on spring properties? I haven't really found any...
  42. J

    Two blocks collide with spring in-between.

    Homework Statement Block 1 (mass 2 kg) is moving rightward at 10 m/s and block 2 (mass 5kg kg) is moving rightward at 3 m/s. The surface is frictionless, and a spring with spring constant of 1120 N/m is fixed on the left side on block 2. When the blocks collide, the compression of the spring is...
  43. CK328

    Equation for spring force for a cylinder on compressed air

    Evening all, I've recently undertaken a project where my roll is to analyse the suspension of a mountain bike. The suspension unit in question is a Rock Shox Monarch RT3. To give a brief summary: The shock uses compressed air as the spring, the pressure is adjustable via an air valve. The shock...
  44. CK328

    Mathematical modeling of a mountain bike rear shock

    Evening all, I've recently undertaken a project where my roll is to analyse the suspension of a mountain bike. The suspension unit in question is a Rock Shox Monarch RT3. To give a brief summary: The shock uses compressed air as the spring, the pressure is adjustable via an air valve. The shock...
  45. Le_Anthony

    Calculating Work Done by a Spring

    Homework Statement An ideal spring is hung vertically from the ceiling. When a 2.0 kg mass hangs from it at rest, the spring is extended 0.06 meters from its relaxed state. An upward external force is then applied to the block to move it upward a distance of 0.16 meters. While the block is...
  46. H

    Motion of mass connected to a spring at constant velocity

    Homework Statement We have a mass m at x = 0 attached to a spring with spring constant k which is moving at constant velocity v such that the position of the spring is described by X = l + vt where l is the equilibrium length of the spring. Solve for the motion of the mass. Homework...
  47. S

    Equal Heights for Two Masses on a Spring: A Question of Energy?

    Homework Statement Two masses A, and B both sit on a vertical spring. If the spring is compressed then released, why do A and B rise to the same height? (the mass of A is greater than that of B) Homework Equations P = mgh S = 1/2kx2 K = 1/2mv2 The Attempt at a Solution Both masses rise to the...
  48. Blockade

    Can someone explain to me the work equation for springs?

    I need to find the work done with springs but I don't understand this equation too well, can someone help me know what are each variable and how to find each of them? WH - fF*d = ΔK + ΔUs + ΔUg? I know that "WH" is the work done by the hand and that "fF*d" is force of friction * displacement...
  49. JulienB

    Spring and string pendulum (oscillations)

    Homework Statement Hi everyone! Here is a new problem about oscillations! Thx to all of you, I'm definitely making progress in the field. Let's see how that problem goes: A pendulum of mass m is hanging on a string of length L and is "pushed" by a spring with spring constant k. At the deepest...
  50. O

    Analyzing a Compressed Spring System

    It's not a homework/coursework question but I did get the system from my textbook. http://puu.sh/o03h7/32cdf7cffb.jpg I solved the question by analyzing the system at different stages. Initially both objects are moving with a velocity and having some mass so their kinetic energies are the...
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