Spring Definition and 999 Threads

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  1. B

    How Is the Spring Constant Calculated from Work Done?

    Homework Statement It requires 49 J of work to stretch an ideal very light spring from a length of 1.4 m to a length of 2.9 m. What is the value of the spring constant of this spring? Homework Equations u=0.5kΔx2 The Attempt at a Solution u=\frac{1}{2}k\Delta x^2\\ k=\frac{2u}{\Delta x^2}\\...
  2. L

    Can the spring constant k be used for crumple? (not spring)

    A question on my lab is find the amount of "stopping force" required to stop the egg, by determining the size of the "crumple zone" A brief description of the lab: Build a container that will keep an egg from breaking as it is dropped from the third floor of the school, your container must...
  3. MMVS

    Hooke's Law Elevator Spring Question

    Homework Statement Elevator initially at rest. Equilibrium length L0=40.0cm 60-kg person stands on spring L1= 32.0cm The elevator than speeds upwards at 2.50 m/s2 What is the new length (L2) Homework Equations Fnet=ma Fsp=-kdeltaX FG=mg The Attempt at a Solution Taking down as positive y hat...
  4. X

    Collision with projectile and block attached to spring

    Homework Statement A projectile of mass m = 50g traveling at v0 = 20m/s hits a block of mass M = 450g. The block rests on a frictionless horizontal surface and is attached to a spring of force constant k = 2000N/m. The projectile ricochets backward off the block with speed v’ = 0.6v0. The...
  5. Icy98

    Spring constant of trampoline and cradle

    1. The problem statement, all variables and given/known Spring constant of trampoline and cradle Homework Equations k=F/x The Attempt at a Solution I think a trampoline should have a low spring constant so that the extension is bigger. Is this correct? For cradle, in my opinion, it should have...
  6. A

    Solve Spring Force/Energy: Find Velocity

    I have a question that asks to find the velocity of the object attached to a horizontal spring when it is halfway to equilibrium. I am given the mass, how far the spring was stretched, and the velocity of the spring when it was released. I am unsure of what it means by halfway to equilibrium...
  7. E

    Work done on two cart system with spring

    Homework Statement Two identical 0.50-kg carts, each 0.10 m long, are at rest on a low-friction track and are connected by a spring that is initially at its relaxed length of 0.50 m and is of negligible inertia. You give the cart on the left a push to the right (that is, toward the other cart)...
  8. J

    How do I model a spring in Ansys 2D for a linear generator?

    Hi friends, I am working on a model of linear generator. I have modeled the linear generator in Ansys 2D. Now I want to attach a spring to one end of the rotor and see how it works with the spring attached to it. How do I model the spring? Also is there any proper way to determine the damping...
  9. Simanto Rahman

    Relation Between Spring Constant and Angular Velocity

    I was going through Periodic Motion chapter of my book and came across an equation while defining the relation between Time Period of on oscillating particle and force constant. k/m=w2 which was applied in, T = 2xpie/angular velocity can anyone please help me define this equation. I can't seem...
  10. H

    Spring energy problem at an incline with friction

    Homework Statement Homework Equations Et = Ek + Eg + Ee The Attempt at a Solution Top:[/B] Et=mgh+1/2k1 Δx12 +1/2k2Δx22 196h+400+600 = ET Bottom: Et=1/2k1Δx22+1/2k2Δx22 400+600=1000 ...and that's when I realized I must have done something wrong. Sorry, I'm kind of bad at this stuff...
  11. K

    Oscillation amplitudeWhat is the amplitude of the oscillation?

    Homework Statement A 1.4-kg cart is attached to a horizontal spring for which the spring constant is 60 N/m . The system is set in motion when the cart is 0.27m from its equilibrium position, and the initial velocity is 2.6 m/s directed away from the equilibrium position. A. What is the...
  12. S

    Help with spring rotating around its axis of rotational symm

    Homework Statement An astronaut on a spacewalk loses her grip on a circular garter spring (pictured below). Looking at the spring she notices that it is rotating around its axis of rotational symmetry at a rate of 300 rpm. The circumference of the rotating garter spring is 1% longer than that...
  13. H

    Maximum speed of a box compressing a spring on an inclined p

    Homework Statement A box of mass m = 40kg is released from rest at thte top of a frictionless ramp. The ramp makes an angle theta = 45 degrees to the horizontal. After sliding fom the rigin a distance d = 2.00 m down the ramp, the box strikes a spring of force constant k = 500 N/m. The box...
  14. K

    Two strings connected by a spring

    55 Hi all, Hello, Racking my brains over this : If I have two semi-infinite strings (made of same material) - which are connected by a massless spring, and now I send a longitudinal wave along one string. Will the spring just pass on the wave to the other string or will it serve to...
  15. L

    Block on a spring on a horizontal surface with friction?

    Homework Statement A 3.0 kg block is held against a spring with a force constant of 125 N/m. The spring is compressed by 12 cm. The ice is released across a horizontal plank with a coefficient of friction of 0.1 A) Calculate the velocity of the block just as it leaves the spring. Assume the...
  16. N

    Spring Compression (x-x0) = .00579 m

    Homework Statement A spring (k = 2900 N/m ) is compressed between two blocks: block 1 of inertia 1.70 kg and block 2 of inertia 2.00 kg. The combination is held together by a string (not shown in (Figure 1) ). The combination slides without spinning across low-friction ice at 2.90 m/s when...
  17. F

    Confused...calculating energy in a spring before launch of a ball

    Homework Statement So a little background before stating the problem: During a lecture a couple weeks prior to lab, the instructor did an example where we were told to find the max height of a ball launched upwards by compressing a spring. In order to calculate that, he showed that E1 is the...
  18. astrololo

    Spring Constant Calculation for a 0.2kg Bloc with 40cm Displacement

    Homework Statement A bloc of 0,2 kg is attached on a horizontal spring without any friction on the floor. The other side of the sprin gis attached to a wall. He does a movement of back and forth . Between the two extremities of the back and forth movement, the bloc has a displacement of 40 cm...
  19. astrololo

    Solving for Max Compression: 0.2kg Spring

    Homework Statement A bloc of 0,2 kg is attached to a spring on a horizontal surface with no friction. (The other side of the spring is attached to a wall, so it doesn't move) The spring constant is 5 N/m. If we pull on the spring, we move it by 0,12 m from its natural position and we let it go...
  20. M

    Spring mass on a rotating disc

    Homework Statement I uploaded a figure demonstrating the problem w and i are constants and disc is horizontal. Disc mass is neglected. Vibrating mass only moves along the direction of springs -only horizontally at this position- [PLAIN]http://[url=http://postimg.org/image/yxuleosq1/]...
  21. T

    Effect of massive spring on static vs dynamic experiment

    I've been reading about this but I couldn't find a conclusive answer. I have to measure the spring constant (k) using a vertical spring-mass (M) configuration and using two different methods: - static method: I calculate elongation vs weight and find a linear fit of the data (the slope is K) -...
  22. Elvis 123456789

    What Is the Sled's Speed When Released from a Compressed Spring?

    Homework Statement At a waterpark, sleds with riders are sent along a slippery, horizontal surface by the release of a large, compressed spring. The spring with a force constant k = 4300 N/m and negligible mass rests on the frictionless horizontal surface. One end is in contact with a...
  23. K

    Spring potential energy and mass

    Homework Statement One end of a vertical spring of spring constant k = 1900 N/m is attached to the floor. You compress the spring so that it is 2.50 m shorter than its relaxed length, place a 1.00-kg ball on top of the free end, and then release the system att = 0. (All values are measured in...
  24. Feodalherren

    How Do You Calculate the Length of a Torsion Bar Spring?

    Homework Statement Homework Equations T=(GJ/L)Φ G=modulus of rigidity J=polar moment of inertia L= length Φ=twist angle (rad) Direct shear = Force/Area Torsional Shear = Tr/J, where T is the torque and r is the radius from the center. The Attempt at a Solution G=11e6 KSI J=(π/16)d^4, where...
  25. T

    Solve Spring Stretch on 30° Ramp, 20kg, 500N/m, Friction 0.3/.2

    Homework Statement A block is sitting on a ramp with a spring behind it, which we are supposed to imagine we are holding. The mass of the block is 20 kg, the angle of the ramp is 30 degrees, and the spring constant is 500 N/m. 1) You pull so the block is accelerating at 4 m/s^2 up the ramp...
  26. benedict1

    How to calculate Young's Modulus for flat spring

    Hi, I have a question regarding calculating Young's modulus for a flat spring. I have a flat spring shown as the left one in the image. Now I fix the bottom of the spring and exert a force F on top of it and it bends for distance of d. Is there any way to calculate young's modulus for this...
  27. T

    Calculating Spring Stretch on a Ramp with Varying Acceleration and Friction

    1. Homework Statement We are dealing with a block of 20 kg mass on a ramp that is at an angle of 30 degrees. The spring constant given is 500 N/m. Picture- https://flic.kr/p/A3aCsM The only difference is that that we are supposed to be holding the spring stationary, it isn't attached to a...
  28. P

    Deriving the Force-Position Relationship for a Spring Powered Model Car

    Homework Statement In your design of an experimental spring powered model car, you note that the speed of the car (mass Mc) increases as the car travels further. The exact relationship is that v(x) = C|x|, where C is a constant and x is the position of the car with respect to the starting...
  29. astrololo

    What Is the Natural Length of the Spring?

    Homework Statement A block is fixed on the extremity of a mobile ideal spring that is horizontal and which has the other side of it fixed (Non mobile). When the length of the spring is 50 cm, the block has a force of 5 N on the right; When the length of the spring is 80 cm, the block has a...
  30. O

    Need confirmation for spring mass system question

    Homework Statement A mass of 1.20 kg. originally at rest, sits on a frictionless surface. It is attached to one end of an unstretched spring (k = 790 N/m), the other end of which is fixed to a wall. The mass is then pulled with a constant force to stretch the spring. As a result, the system...
  31. B

    Hooke's law for vibrating massive spring

    Hello, Just for curiosity... Is Hooke's law valid for a vibrating massive spring ? I have done some calculations using both Newton's 2nd Law and the conservation of energy to a horizontal swinging spring connected to a small block in the absence of any friction. I have found that the tension of...
  32. R

    Mass-Spring Systems and the Relationship Between Force, Displacement, and Energy

    Homework Statement A mass is attached to a spring which is mounted onto a wall. This mass is on a frictionless horizontal surface. You apply a CONSTANT force to the mass and it comes to a stop in 10 cm. My question is, that since the mass comes to a stop in 10 cm then: Force Applied = kx...
  33. M

    Work done in vertical springs & External Agent

    Homework Statement I've encountered an answered problem in this book titled, "Physics for Scientists and Engineers with Modern Physics, 9th Ed" by Serway at page 187. So there is a spring which is hung vertically. 1. The first condition was the spring at an equilibrium state (ΔX=0) 2. The...
  34. carb

    Mass dropped with preloaded spring

    Hello everybody, I'm trying to figure out how to calculate xadd, the additional compression of a preloaded spring (initially compressed of xp) on which a mass is dropped from a height "h". I also wonder : - if the final compressed spring length is the same with or without preload ? - if the...
  35. P

    Block and spring on ramp; find compression

    An inclined plane of angle θ = 20.0° has a spring of force constant k = 525 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 = 2.31 kg is placed on the plane at a distance d = 0.312 m from the spring. From this...
  36. D

    What Is the Maximum Speed of a Mass in a Driven Damped Oscillator?

    Homework Statement A small block (mass 0.25 kg) attached to a spring (force constant 16 N/m) moves in one dimension on a horizontal surface. The oscillator is subject to both viscous damping and a sinusoidal drive. By varying the period of the driving force (while keeping the drive amplitude...
  37. H

    Calculating Energy Components in a Pogo Stick Jump

    Homework Statement A man is jumping up and down on a pogo stick. For the purpose of this problem, we will think of such a stick as being a (massless) spring with a guy + stick on top. We will assume that no friction is involved, and so in principle the guy could keep jumping forever. At...
  38. B

    Projectile Motion spring launch

    Homework Statement I am trying to find the force needed from a spring to launch a mass of 800g to a length of 0.875m. This launch would be at the optimum angle of 45º. I am aware of all projectile motion equations but am having difficulty linking them to force and thus solving the problem...
  39. I

    Solving Spring Force Equation: 2X

    Hello, If we have a spring at rest and has a constant k=2 N/m (at its natural length with one end at origin (x=0) and the other end held stationary) is having a force applied on it. The force varies in same way as the the spring with function 2X. My question is how is it possible to start the...
  40. BluberryPi

    Solve Unknown Spring Equation from Foxtrot Comic Strip

    Hey, I am a new member, and I have a question. One of my favorite comic strip is foxtrot because it has so much physics:smile:! When I read this particular strip, however (7/30/2000- find it on Foxtrot GoComics) I was puzzled by the equations. Fortunately, 4 of them were printed in the Gocomics...
  41. G

    A spring is suspended on the ceiling of a truck, find acceleration?

    Homework Statement A massless spring with a spring constant k = 500 N/m is suspended from a hook on the ceiling of a cargo truck moving in a straight line (horizontally) on the highway. A child reaches over from her seat and suspends a 1.1 kg toy on the free end of the spring. The child...
  42. S

    What is the spring constant for the spring?

    Homework Statement A mass 2.74 kg is hung from a spring. The mass is pulled down a short distance and released, it oscillates with a frequency f = 1.972 Hz. What is the spring constant for the spring? Homework Equations f=1/2pi*sqrt(k/m) The Attempt at a Solution 1.972 = 1/2pi*sqrt(k/2.74)...
  43. yango_17

    Charged balls connected by spring

    Homework Statement Consider two small balls with charges +q and -q, connected by a spring with spring constant k. A homogeneous electric field E has been turned on. E is collinear with the line that connects -q to +q. By how much will the string stretch? Homework Equations Coulomb's Law...
  44. wololo

    Springs with Dashpot: Understanding Motion Equations

    Homework Statement Homework Equations ∑F=ma F=-kx x = Ae-γt/2cos(ωt + ∅) The Attempt at a Solution I have looked up this old thread but don't understand how to get the equation of motion from : ma1=-kx1-k(x1-x2) - bv ma2=-kx2-k(x2-x1) - bv...
  45. wein7145

    Repeat History: Design a test to prove who is right spring

    Homework Statement Not surprisingly there is an old forum post on this topic: https://www.physicsforums.com/threads/proving-force.46215/ However it doesn't contain the answer. Reposted: Two physics students are having a debate about the best way to define a force scale using rubber bands. Each...
  46. upender singh

    What Is the Stiffness Constant k of the Spring?

    1:question A weight W is suspended from a rigid support by a hard spring with stiffness constant k . The spring is enclosed in a hard plastic sleeve, which prevents horizontal motion, but allows vertical oscillations. A simple pendulum of length l with a bob of mass m (mg<<W) is suspended from...
  47. A

    Find length of spring in its equilibrium position

    As shown in Figure Q1a, a frictionless, massless, piston, supported by two springs, A and B, is held by a pin in a vacuum inside a rigid-walled container. The properties of the springs are: spring constants kA = 3,859 and kB = 3,090 (in N/m), natural lengths LA0 = 0.03 and LB0 = 0.1 (in m). When...
  48. A

    Find length of spring A in equilibrium position

    As shown in Figure Q1a, a frictionless, massless, piston, supported by two springs, A and B, is held by a pin in a vacuum inside a rigid-walled container. The properties of the springs are: spring constants kA = 3,859 and kB = 3,090 (in N/m), natural lengths LA0 = 0.03 and LB0 = 0.1 (in m). When...
  49. S

    Approximate spring potential energy U(x) for small oscillations

    Homework Statement "Take a PE function U(x), which has an equilibrium point at x=0, and provides a restoring force in that region, and show that a Taylor expansion around that area can be approximated by a SHO PE function for small x." Homework Equations U=.5kx^2...x =...
  50. B

    Maximum extension of a spring on an inclined plane

    Homework Statement A block of mass ##M = 1 kg## is placed of a fixed rough incline of inclination ##\theta=sin^{-1} \frac{7}{10}## and coefficient of friction ##\mu=\frac{1}{\sqrt{51}}##. It is connected to a spring of spring constant 100 N/m. Initially the spring is in natural state with...
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