For a system such as shown in figure 1, the springs elongation, x x0, is dependent upon the spring constant, k, and the weight of a. Predict qualitatively how will the angular frequency will change compared to the case where you had a spring that was not as stiff. In the static method, we explored hookes law, fx kx, by recording stretch length for various masses hung on a spring and obtained ks 1. Static method and dynamic method, to decide the spring constant of a spring.
Hang the spring from the pendulum clamp and hang the mass hanger from the spring. To determine spring constant of a spiral spring by oscillation method. Place a stool under the hanger and measure the initial height x0 above the stool. In this lab, the motion sensor measures the position of the oscillating mass, and the force sensor is used to determine the spring constant. Average these 11 values for k together to get your spring constant value for part ii. This is the force, expressed in newton, which will produce an elongation of one meter in the spring. Additional instructions are included below to guide you through the experiment, and you can add your own steps. Elastic force acts in the opposite direction of the external force. Within the experiment, in the first two parts we will determine the spring constant of a spring using two different methods.
It is also possible to study the effects, if any, that amplitude has on the period of a body experiencing simple harmonic motion. Nov 25, 2016 to find the force constant of a helical spring by plotting a graph between load and extension physics lab manualncert solutions class 11 physics sample papers aim to find the force constant of a helical spring by plotting a graph between load and extension. Apparatus stand meter rule two springs with di erent spring constants slotted mass set stopwatch 1 single spring objective calculate the spring constant of the two springs using hookes law. To determine the spring constant of a spring by a static method, and b dynamic method. During the conduction of this lab, several new phrases that were defined came up. A spring constant is the measure of the stiffness of a spring.
If a spring is permanently deformed by something like crushing or overstretching, it will. A helical spring, is a mechanical device which is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. If the bestfit line is linear, then the spring extension is directly proportional to the applied force, and the constant of that proportionality can be obtained from the. Design and fabrication of a spring constant testing machine and determination of spring constant of a compression spring. The fact that the spring constant is a constant it is a property of the spring itself, shows that the relationship is linear. If a mass m is attached to the lower end of the spring, the spring stretches a distance of d from its initial position under the influence of the load weight.
In the third part of the experiment we will determine acceleration due to gravity by using a simple pendulum. Hypothesis the change in length of spring is directly proportional to the applied so that it will cause greater change in. Various springs of different construction are included, so students can better understand the physical meaning of the spring constant. Hookes law objective use springs to investigate hookes law, springs in series and parallel, and oscillations.
Note that in this equation m is the total mass attached to the spring. One of the goals of science is the development of physical and mathematical models to describe physical systems by using observational and experimental data. The helical spring, is the most commonly used mechanical spring in which a wire is wrapped in a coil that resembles a screw thread. The spring in the shock absorber will, at a minimum, have to give you 2,450 newtons of force at the maximum compression of 0.
This elastic behavior of springs can be explained through hookes law and formula 1. Procedure in this lab, you will observe a mass on a spring and. Objectives the main objective of this experiment is to show hookes law of spring, calculate the total energy. A spring of length l 1 is hung up by a bracket as shown in figure 1. General science laboratory 1110l lab experiment 5 the. Procedure in this lab, you will observe a mass on a spring and, from this, determine the value of k for that spring. General science laboratory 1110l lab experiment 5 the spring. Springs tend to have a higher spring constant, and once they are deformed they are a great example of newtons third law of motion stating that for every force there is an equal opposite force.
In this form, it is apparent that if a plot of f as a function of. The constant is known as the force constant of the spring. Experiment339 f measurement of spring constant by static and dynamic methods sarmistha sahu dept. We will determine the spring constant, for an individual spring using both hookes law and the properties of an oscillating spring system. We can then use the force of the cord in hookes law to find the spring constant of the cord. Hookes law utk department of physics and astronomy. Set up the apparatus as in the diagram add a 10 g mass to the. Static and dynamic analysis of spring constant measurement for mechanical laboratory engineering program. To find the force constant of a helical spring by plotting graph between load and extension. The period of oscillation, t, for a mass on a spring is given by 1 where m is the oscillating mass and k is the spring constant. For each measurement of the period t, determine the spring constant k using t 2. To find the force constant of a helical spring by plotting a graph between load and extension physics lab manualncert solutions class 11 physics sample papers aim to find the force constant of a helical spring by plotting a graph between load and extension.
This is because the gradient is equal to 1 the value can be compared to the theoretical value by using hookes so as to verify the result whether it is plausible or not. The values in the first column represent the force applied on the body in newtons n. The objective of the experiment is to determine the spring constant of a spiral spring by hookes law and by its period of oscillatory mo tion in response to a weight. Feb 03, 2014 this video belongs to me and i have all rights towards the video. A spiral spring, a set of weights, a weight hanger, a balance, a stop watch, and a lab scale. Physics lab report 2 hookes law and simple harmonic. It is also possible to study the effects, if any, that amplitude has on the period of a. F kx 1 where fis the force, xis the displacement of the free end of the spring and kis a constant that depends on the internal properties of the spring. Here k is the spring constant which is a quality particular to each spring.
Static method is used to measure how long the spring extended after load applied. Remote work advice from the largest allremote company. Nov 14, 2014 table 1 represents the data collected when the hookes law experiment was performed on three different types of elastic bodies. If a weight, w mg, is hung from one end of an ordinary spring, causing it to stretch a distance x, then an equal and opposite force, f, is created in the spring which opposes the pull of the weight. Conclusion in this experiment the stretch of a spring. Hookes law experiment report done by yovaphine wijaya 11 science 1 aim to investigate hookes law for simple strings or rubber. Hookes law will be verified for a spring and the force constant will be calculated by measuring the amount the spring is stretched when various masses are hung on it. In this experiment you will investigate simple harmonic motion for a spring and mass system. Spring constant measurement static dynamic method free download as pdf file. In order to figure out how to calculate the spring constant, we must remember what hookes law says. The purpose of this lab experiment is to study the behavior of springs in static and dynamic situations. When determining the spring constant, be sure the spring has an initial load sufficient to separate the coils and remove. Physical sciences 2 and physics e1ax, fall 2014 experiment 5 7 now hang the mass stand with the extra mass to the stiffer spring. Spring constant meaning in the cambridge english dictionary.
The forces supplied by the masses are due to their weight which can be found by. Hookes law experiment hookes law experiment and analysis. Twisted helical torsion springs are used in engine starters and hinges. Pdf experiment 6 helical spring mahitha girish academia. The small spring constant of the torque spring precluded the determination of density from the impact tests. Spring constant measurement static dynamic method weight. A spiral spring, a set of weights, a weight hanger, a balance, a stop watch, and a two meter stick. Theory measuring the stretching produced by different loads, added to the spring, tests the elasticity of a spring. The constant kis called the spring constant and is always a positive number.
The gradient of straight line was then used to calculate the spring constant, k, for the spring used in this experiment. This is an example of a common experiment used to investigate hookes law. Determining the spring constant of our bungee cord your name and your lab partner. Mechanical behavior of a spring arizona state university. The kinetic energy transferred to a pascar is measured and compared to the potential energy lost by the spring. In this experiment, the stretch of a spring changes as the force applied on the spring changes. F is a restoring force, k is a constant of proportionality and x is the distance the. Pdf the spiral spring find, read and cite all the research you need on. Lets study how we can use the helical spring to do our experiment. Hypothesis the change in length of spring is directly proportional to the applied so that it will cause greater change in length of the spring for greater force. To find the force constant of a helical spring by plotting. Spring constant experiment purpose the purpose of this experiment is to perform two method. The second, third and fourth column represents the extension of the bodies after the.
Add 50 g to the mass hanger and determine the change in position caused by this. Heres 12 spring science activities that are super easy to set up. To measure the spring constant of a spring using two different methods. To determine the spring constant of a spiral spring. Experiment 9 spring constant aim to find the force. The rest position x of the pointer p on the scale is the. Investigating hookes law forces ks3 physics revision. The dynamic method is used to measure the frequency of the back and forth movement at a regular speed known as oscillation with the weight. Hooke, depotentia restitutiva 1678 we have measured the strength k of a mechanical spring using both static and dynamic methods. The period of oscillation is measured, and compared to the theoretical value. Pendulum clamp, aluminum pole, large clamp, assorted masses, mass hanger, spiral spring, ruler, and 2 meter stick. Objectives after todays experiment, you will be able to. To determine the spring constant of a spiral spring by hookes law and by its period of oscillatory motion in response to a weight. The spring constant of a screendoor spring was determined both statically, by.
To find the spring constant of the given helical spring using load extension method also to determine the mass of the given body. Conclusion in this experiment the stretch of a spring changes. The primary purpose of the lab is to study hookes law and simple harmonic. If a weight, w mg, is hung from one end of an ordinary spring, causing it to stretch a distance x, then an equal and opposite force, f, is. Hookes law helps explain the first parts of this experiment. Hookes law elastic force occurs in the spring when the spring is being stretchedcompressed or deformed. The spring constant of a screendoor spring was determined both statically, by measuring its elongation when subjected to loading, and dynamically, by measuring the period of a mass hung from one end and set into vertical oscillation. Experiment 6 the spring constant determination purpose. Experiment 10 about its rest or equilibrium position. Table 1 represents the data collected when the hookes law experiment was performed on three different types of elastic bodies. November 1, 2016 abstract the goal for the overall bungee challenge is to create an ideal bungee experience for an egg, where it does not. This video belongs to me and i have all rights towards the video. Apparatus spring, a rigid support, slotted weights, a vertical wooden scale, a fine pointer, a hook. Of course, hookes law only remains true when the material is elastic.
Your task is to design an experiment to determine the relationship between the applied force and spring extension, and if the relationship is linear as suggested by hookes law, determine a value for the spring constant. Theory when a load f suspended from lower free end of a spring hanging from a rigid support. Environmental education resources to commemorate earth days 50th anniversary. Excel can also be used to obtain k by fitting a linear trendline to the forcedeflection data. Day two prelab exercise describe a method with which to determine whether a rubber band obeys hookes law.
Pdf design and fabrication of a spring constant testing. Are you ready to see your childrens faces light up with wonder. As the stretch increases, the force increases, and it is a constant increase. Experiment 9 spring constant aim to find the force constant. It should help you understand how to work scientifically. Therefore in order to verify hookes law, you must verify that the force f and the distance the spring is stretched are proportional to each other that just means linearly dependant on each other, and that the constant of proportionality is k.
Experiment 9 spring constant aim to find the force constant of a helical spring by plotting graph between load and extension. The spring is then compressed or stretched and released. Peckham physics 307 fall 1983 digitized and revised, fall 2005 abstract the spring constant of a screendoor spring was determined both statically, by measuring its elongation when subjected to loading, and dynamically, by measuring the. Page 1 to find the force constant and effective mass of a helical. You will design an experiment to determine the spring constant of given spring and use that to predict the frequency of oscillations. Comment on how the spring constant of an auto spring compares to the spring constant you measured today. How to calculate a spring constant using hookes law. Peckham physics 307 fall 1983 digitized and revised, fall 2005 abstract the spring constant of a screendoor spring was determined both statically, by. Thus it measures the time for the masses and thus the spring, to complete a whole period. The kinetic energy transferred to a pascar is measured and compared to the potential energy lost by. For the shm part of the experiment, a single mass of 4kg was. It tries to bring the deformed end of the spring to the original equilibrium position. The springs restoring force acts in the opposite direction to its elongation, denoted by the negative sign.
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