Spring Definition and 999 Threads

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  1. W

    Determine the compression of the spring

    Homework Statement Russian aviator Vsevolod Mikhailovich Abramovich invented the Abramovich Flyer based on the design of the Wright brothers' first plane. After this first success, Abramovich became obsessed with deep space travel designing a spring based launcher to fire a probe of mass 90kg...
  2. SherlockIsReal

    Comparing SHM of Two Identical Masses on Springs

    Homework Statement Compare the simple harmonic motion of two identical masses oscillating up and down on springs with different spring constants. Homework Equations F = -kxThe Attempt at a Solution Okay, so I understand that the higher the spring constant, the harder it is to compress the...
  3. S

    Spring launcher equation to find x

    Homework Statement In my physics 12 class, we were given a spring and had to launch it at an angle into a target (the object launched is the spring itself). The target was on the floor level but the spring was launched from above the floor level. I need to find out how far to pull the spring...
  4. K

    Spring loaded door pusher for Chamber

    Hello. I manufacture Parts Cleaning Machines. I have hit a small obstacle in designing a new machine in which I have to push the door of a chamber from front in order to obtain a perfect seal (for vacuum & to prevent leaks). Some research on the internet has led me to videos of similar...
  5. S

    Equation of Motion for pendulum suspended from a spring

    Homework Statement Derive Newton's and Lagrange's equation of motion for the system. Discuss differences and show how Newton's equations can be reduced to lagrange's equations. Assume arbitrarily large θ. The system is a pendulum consisting of a massless rod of length L with a mass m...
  6. A

    Finding Spring Constant for Rotational Motion Problem

    Homework Statement (Sorry for my bad English) A slippery (frictionless), light horizontal bar rotates about a vertical axis with a constant angular velocity ω. A cylinder with mass m, is initially attatched to a thread with length a and to a spring, which from the beginning has its "natural"...
  7. L

    Curiosity Question 2: Stopping a mass on a spring

    For an introduction to the Curiosity Questions, please see the intro to Curiosity Question 1 Here is the first part of another problem I made up. As I said in Question 1, I am posting this for a) the enjoyment of everyone who reads them b) work checking to see if they are riddled with mistakes...
  8. S

    EOM for Pendulum hanging from spring

    Homework Statement Derive Newton's and Lagrange's equation of motion for the system. Discuss differences and show how Newton's equations can be reduced to lagrange's equations. Assume arbitrarily large θ. The system is a pendulum consisting of a massless rod of length L with a mass m...
  9. G

    Is Work Positive or Negative on a Stretched Spring with a Mass?

    Homework Statement Hi, I am thinking about a stretched spring with a mass on it. When the spring is fully extended and has just started to pull the mass back towards the equilibrium point, is the work positive or negative? Homework EquationsThe Attempt at a Solution [/B] I think as the...
  10. K

    Where did I go wrong in my solution?

    Homework Statement I have a physics midterm on Wednesday and I'm doing some practice problems to prepare. On one of them, I'm getting an answer that is extremely close to the answer my TA gave me for the problem and I can't tell if it's rounding or if I'm missing something. A mass is attached...
  11. M

    Bungee jump height/spring energy

    Homework Statement Imagine that you have been given the job of desiging a new bungee jumping platform. Customers of mass 53.0 kg will step off a platform, attached to a rope of unstretched length 52.6 m and spring constant 17.0 n/m. How far below the platform will the end of end of the rope...
  12. Essence

    Why does the force of a spring = -kx

    I know this is an idealization, but I'm wondering if there is a reason this idealization works so well. Is it related to the coil of the spring or the bonds between each atom in the spring? I have considered using ## F = \frac{kq_1q_2Nsin\left(\theta \right)}{r^2} ## Where: ##...
  13. K

    Creating a spring using only beams

    Attached is my ANSYS model of a spring made using cantilever beams. In playing around with with different dimensions, I noticed that the longer I made the connecting section (dirty green section) the less of a total deflection there was. Could someone explain to me why this is? The overall goal...
  14. T

    Work, Kinetic Energy, Spring, Friction Problem

    A block slides from rest, along a track with an elevated left end, a flat central part, into a relaxed spring, as shown in the figure. The curved portion of the track is frictionless, as well as the first portion of the flat part of L = 10 cm. The coefficient of kinetic friction between the...
  15. P

    Calculating Applied Force in a Two-Crate System with a Spring

    Homework Statement Two large crates, with masses 575 kg and 255 kg, are connected by a stiff, massless spring (k = 7.8 kN/m) and propelled along an essentially frictionless, level factory floor by a constant force applied horizontally to the more massive crate. If the spring compresses 4.7 cm...
  16. P

    Simple Harmonic Motion problem with spring mass system

    Homework Statement A 50g mass is attached to a spring and undergoes simple harmonic motion. It's maximum acceleration is 15m/s and maximum speed is 3.5m/s. Determine a)angular frequency, b) spring constant, c) amplitude. Homework Equations ω = √k/m X(t) = A*cos(ωt + ∅) The Attempt at a...
  17. S

    Did I Make a Mistake in My Spring Constant Calculation?

    The goal is to measure the spring constant of a spring and then calculate a theoretical period of the oscillation and compare the results to a real life measurement. Extension of spring A: Neutral: 52 cm 1 N: 41 cm 2 N: 30 cm F = kx k = 9.1 N/m 10 oscilliations = 9.26 seconds Calculating the...
  18. H

    A spring and two blocks with kinetic energy

    1. I have two blocks, one that is 1.6 kg moving left at 3.00 m/s and the other is 2.1 kg moving right at -1.74 m/s, and they are compressing a block with a spring constant of k=600 N/m. I'm supposed to be finding the distance that the spring is compressed at that instant, and I know that...
  19. Z

    Finding density of fluid from a mass on a spring in fluid

    http://imgur.com/rE7jLlC When setting up the sum of forces I had an unknown value for the spring, buoyancy, and normal force. What I tried was setting up a triangle to find the length of the spring, which was 1.039m with that I could find the force acting on the spring, 4.3N, which would be the...
  20. I

    Equation of motion for a rotational mass and spring system

    Homework Statement A small ball with mass M attached to a uniform rod of mass m and length l pivoted at point o and attached to two springs with spring constant k1 and k2 at distance d1 and d2 from point o as shown in Fig 2. The system oscillates around the horizontal line. Assume the system...
  21. K

    Finding the maximum compression of a spring

    Homework Statement A block of mass m1 slides along a frictionless table to the right with a speed of v1. A second mass M2 slides in the same direction with a speed of v2 such that it will collide with m1 which is in front of m2. Say that a spring of stiffness k is attached to one of the masses...
  22. Suraj M

    Solving Spring & Block Homework Problem

    Homework Statement The figure has 2 blocks, each 320 g connected by a light string. The horizontal surface is smooth. The block A is attached to a spring of spring constant 40 N/m whose other end is fixed 40cm above the horizontal. Initially the spring is vertical and unstretched. Homework...
  23. Suraj M

    Calculating the Height of a Block Launched from a Compressed Spring

    Homework Statement A block of mass 250 g is kept on a vertical spring with spring constant 100N/m fixed from below. The spring is now compressed to have a length 10 cm shorter than its natural length and is released. How high does the block rise?g = 10m/s Homework Equations E=½kx² and other...
  24. Yam

    How Does Gravity Affect the Velocity of a Block on a Spring?

    Homework Statement [/B] The force constant of a spring is 600 N/m and the un-stretched length is 0.72 m. A 3.2-kg block is suspended from the spring. An external force slowly pulls the block down, until the spring has been stretched to a length of 0.86 m. The external force is then removed, and...
  25. Y

    Potential energy. What is the spring constant?

    Homework Statement Figure 8-36 shows an 8.00 kg stone at rest on a spring. The spring is compressed 10.0 cm by the stone. (a) What is the spring constant? 2. Relevant formula Mechanical energy is conserved The Attempt at a Solution The decrease in gravitational potential energy that occurs...
  26. X

    Does the potential energy of a spring do work on the both

    Suppose we have two boxes, A and B with different masses, the spring is fixed to block A. Then we take block B and press it against block A so that the spring compresses. Afterwards, we let go of both boxes. If we were to model this using the conservation of energy, then it is known that...
  27. Jediknight

    What is the maximum distance traveled by the block in a vertical spring system?

    Homework Statement The hand in (Figure 1) (a) holds a vertical block-spring system so that the spring is compressed. When the hand let's go, the block, of mass m, descends a distance d in a time interval Δt before reversing direction in (Figure 1) (b). Once the system comes to rest, the...
  28. T

    The coefficient of friction by spring compression

    Homework Statement A box has the mas 50.0Kg. The box slides on a horizontal surface that has friction. The box has the velocity 3.00m/s when its 0.600m away from a spring with negligible mass and the force coefficent 20Kn/m. The box hits the spring and comes to a momentary rest after...
  29. Philethan

    The period of the spring without ignoring its mass

    Homework Statement A block of mass M is connected to a spring of mass m and oscillates in simple harmonic motion on a horizontal, frictionless track. The force constant of the spring is k and the equilibrium length is l. Assume that all portions of the spring oscillate in phase and that the...
  30. L

    Understanding Force of a Spring: Restoring Force vs Applied Force Explained

    So if I have a block of mass connected to a spring with spring constant k. If I pull the spring with force F, what is the force that is pulling the block? Is it F or the restoring force of the spring? I think it should be the restoring force of the spring, but if it is F, why is it so?
  31. _N3WTON_

    Kinetics: Two Blocks and a Spring

    Homework Statement Suppose a block of Uranium and a block of Radium, both with edge length \lambda , are pushed to the head of an un-stretched spring (spring constant k , un-stretched length \delta _0 ). The combination, pushed \delta farther, compresses the spring. Upon release, the...
  32. hdp12

    Problem Check: Equilibrium of Particles

    Homework Statement A continuous cable of total length 4 m is wrapped around the small pulleys at A, B, C, D. If each spring is stretched 300 mm, determine the mass m of each block. Neglect the weight of the pulleys and cords. The springs are unstretched when d=2 m. The Attempt at a Solution I...
  33. M

    Rotational Spring Arbitrary Motion

    What I want to do is model the rotational behaviour of two bodies (1 and 2). They are connected by three virtual rotational springs (representing a link between them). For a normal (translational) spring the forces on body 1 in X, Y, and Z would be easily calculated as: $$ \mathbf{F}_1 =...
  34. R

    Calculate Force Needed to Stretch Spring 48cm: 270 N/m

    Homework Statement What force is necessary to stretch a spring 48 cm, if the spring constant is 270 N/m? Homework Equations 1/2kx^2 The Attempt at a Solution tried plugging everything into equation and got 31 but it is wrong. Any help would be greatly appreciated
  35. S

    Does Initial Spring Tension Affect SHM Frequency?

    Find the spring constant by timing simple harmonic motion. I have done a Hooke's law experiment already and found out about initial tension. What I learned was: force ≠ spring constant x displacement force = initial tension + (spring constant x displacement) So using F=kx would not give an...
  36. K

    High school physics problem involving a spring slingshot

    Homework Statement For a grade 12 physics project we have to stretch a spring along an inclined plane and then let go so that it hits a target. I know the mass of the spring, the angle of the incline, the height of the incline (how high the front of the spring would be off the ground before...
  37. F

    Understanding the Effective Spring Constant

    Homework Statement For the following arrangement of two springs, determine the effective spring constant, keff. This is the force constant of a single spring that would produce the same force on the block as the pair of springs shown for this case. (Spring 1 is attached to Spring 2 which is...
  38. L

    Blocks attached with spring is released from rest

    1. Consider the situation shown in figure. Initially the spring is unstretched when the system is released from rest. Assuming no friction in the pulley, find the maximum elongation of the spring. https://drive.google.com/file/d/0B3FvaDRwJ2neQWtBU3JrazVTeEU/view?usp=sharing Homework...
  39. Y

    Phase space diagram for a spring in simple harmonic motion

    Homework Statement A mass m = 750 g is connected to a spring with spring constant k = 1.5 N/m. At t = 0 the mass is set into simple harmonic motion (no damping) with the initial conditions represented by the point P in the phase space diagram at the right. **(This phase space diagram has...
  40. AdityaDev

    How does the separation between block and spring affect the time period?

    Homework Statement a block of mass m as shown in figure lies on a smooth horizontal surface and springs are at natural length. when the block is displaced slightly then find the time period of oscillation Homework Equations $$T=2\pi\sqrt{\frac{m}{k}}$$ for series connection of...
  41. hdp12

    What is the weight of block D in this equilibrium of particles problem?

    Homework Statement Here is the problem that I am stuck on in my mechanics class. https://lh4.googleusercontent.com/ygXVjNfI4iP8xVpEjhxXZlWlDqg_VrM2gCVFLyomOVwWCfcLU78mIcPEc7hEzUqBoACIiQ=w1210-h506 Homework Equations F=-kx The Attempt at a Solution See the attached picture of my work...
  42. T

    Mass on a Spring: Determine Periodic Time, Frequency & Acceleration

    Homework Statement A spring has a stiffness of 30 KN/m and supports a mass of 8 kg. The mass is pulled so that the spring t extends by amplitude of 10 mm and its released so that it produces linear oscillations . Homework Equations (i) Determine the periodic time,circular frequency,and the...
  43. H

    Maximum separation between blocks on spring

    Homework Statement Two blocks, each of mass m, are connected on a frictionless horizontal table by a spring of force constant k and equilibrium length L. Find the maximum and minimum separation between the two blocks in terms of their maximum speed, vmax, relative to the table. (The two blocks...
  44. A

    SHM Question: What is the maximum extension of the spring?

    Homework Statement A 50g block is attached to a vertical spring whose stiffness constant is 9N/m. The block is released at the position where the spring is unextended. What is the maximum extension of the spring? How long does it take the block to reach the lowest point? Homework Equations...
  45. H

    Does buoyancy affect the extension of a real spring?

    In Hooke's law, F=-kx. Assume that a mass is hung from the end of an ideal massless spring, the spring stretches a distance of x. However, in real life the spring has mass and it is submerged in a "fluid" of air. Compared to an ideal spring, would the real spring have a slightly different...
  46. R

    Phasor representation for a mass and spring

    Hi, While writing the Fourier representation for the spring-mass system, we have the equation: (-jωm+B-S/jω).U(jω)=F(jω) with F,U,m,B and S being the force, velocity,mass, damping coefficient and spring constant respectively. From this equation, is it right to infer that : 1) Force lags the...
  47. M

    Using a bearing to replace a spring?

    I am working on a project that uses a box design with a base. The base has two through holes on the the outer edges that will be used to slide up and down with in the box. The box will support two guide rods where the base can slide up and down. My intention was to use springs so that as...
  48. P

    Weighing with A 400 N Scale and 80 N Spring Dynamometer

    Homework Statement A former student of mechanics wishes to weigh himself but has access only to a scale A with capacity limited to 400 N and a small 80 N spring dynamometer B. With the rig shown he discovers that when he exerts a pull on the rope so that B registers 76 N, the scale A reads 268...
  49. J

    Netforce of spring, hookes law. help

    Homework Statement An "extreme" pogo stick utilizies a spring whose uncompressed length is 46 cm and whose force constant is 1.4 x 10^4 N/m (14000). A 60 kg enthusiast is jumping on the pogo stick, compressing the spring to a length of only 5.0 cm at the bottom of her jump, Calculate; a) The...
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