Which spring do you think will have the higher spring constant? Question 2: When you pull the spring out and hold it, you should feel a force being exerted on you by the spring. How does that force compare to the force you are applying?
What makes you say that? Question 3: If you let go of the spring, what will happen to it? Explain why, in terms of forces. The first thing we must do is calibrate the force sensor, so that it will only read the force that we are exerting on the spring, and no other forces. Hang the green spring from the force sensor next to the meter stick.
Do not stretch the spring yet. Select five data points and average them. Question 4: What is the size of the force felt by the unstretched spring? Where does this force come from? It is important to find out what this unstretched force is, because in this lab we are only concerned with the force that you exert on the spring. If you were to pull on the spring now, the force sensor would register both the force you were exerting and the force the unstretched spring feels.
The force felt by the spring will be displayed on the graph, and as a stream of numbers on the right of the screen. Deformation Elastic materials, and objects such as springs, change shape when a force is exerted on them: stretching happens when the material or object is pulled compression happens when the material or object is squashed A change in shape like this is called deformation. Hooke's Law The extension of a material or a spring is its increase in length when pulled.
You can then plot a force-extension graph: plot force on the vertical y axis plot extension on the horizontal x axis The graph should be a straight line that passes through the origin 0,0.
A force-extension graph for a spring Using Hooke's Law In a force-extension graph: the steeper the line, the stiffer the spring the area under the line is the work done energy needed to stretch the spring. Example Question Using the graph, calculate the work done to extend the spring from 0 m to 0. What is the ideal gas law constant?
How do you calculate the ideal gas law constant? How do you find density in the ideal gas law? Does ideal gas law apply to liquids? Impact of this question views around the world. You can reuse this answer Creative Commons License.
The gravitational force , spring force , magnetic force according to some definitions, see below and electric force at least in a time-independent magnetic field, see Faraday's law of induction for details are examples of conservative forces , while friction and air drag are classical examples of non- conservative. Below the elastic limit, we say that the spring is showing " elastic behaviour ": the extension is proportional to the force, and it'll go back to it's original length when we remove the force.
This means that when a force is applied to deform the shape, it stays deformed when the force is removed. Only two ways of doing it. Either grinding it thinner, or adding a coil or two, then heating it at red to orange heat. Then heating to critical temperature and quenching to harden it, and then tempering it back to spring quality. A ten pound rate may not seem like much on a large spring but on a small spring , it might be just enough. If you lower the amount of coils, you'll increase the spring stiffness which is the spring's rate.
If you adjust the outer diameter or the wire diameter, you will affect spring's force and stiffness as well. Springs are made from a variety of elastic materials, the most common being spring steel. Some non-ferrous metals are also used including phosphor bronze and titanium for parts requiring corrosion resistance and beryllium copper for springs carrying electrical current because of its low electrical resistance.
The stiffness , k, of a body is a measure of the resistance offered by an elastic body to deformation. How far can you stretch a spring? Category: science physics.
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