Hooke’s law states that the strain of the material is proportional to the applied stress within the elastic limit of that material. When the elastic materials are stretched, the atoms and molecules deform until stress is applied, and when the stress is removed, they return to their initial state.
Why is Hooke’s law used?
Hooke’s Law is used at all branches of science and engineering; For understanding the behaviour of elastic materials there is no substitute of Hooke’s law. It is used as the fundamental principle behind the manometer, the balance wheel of the clock, and a spring scale.
What type of law is Hooke’s law?
In physics, Hooke’s law is an empirical law which states that the force (F) needed to extend or compress a spring by some distance (x) scales linearly with respect to that distance—that is, Fs = kx, where k is a constant factor characteristic of the spring (i.e., its stiffness), and x is small compared to the total …
What is Hooke’s law GCSE physics?
Extension and compression Extension happens when an object increases in length, and compression happens when it decreases in length. The extension of an elastic object, such as a spring, is described by Hooke’s law: force = spring constant × extension.
What is Hooke’s Law Short answer?
Hooke’s law also referred to as the law of elasticity was discovered by an English scientist named Robert Hooke in the year 1660. Hooke’s law basically states that “when an object has a relatively small deformation the size of the deformation is directly proportional to the deforming load or force.”
What is Hooke’s Law with example?
A balloon is elastic in nature. When the air molecules are blown in it, it expands. Similarly, when it is evacuated, it shrinks in size. The expansion and compression of the balloon depend on the force with which the air is pressed into it; therefore, it works on the basis of Hooke’s law.
What is the formula of spring force?
F = -kx. The proportional constant k is called the spring constant. It is a measure of the spring’s stiffness. When a spring is stretched or compressed, so that its length changes by an amount x from its equilibrium length, then it exerts a force F = -kx in a direction towards its equilibrium position.
What is Hooke’s Law and Young’s modulus?
Hooke’s law is a fondamental rule of thumb applied on skin that describes a direct proportionality link between the force applied on an object and the induced strain. Young’s Modulus is a constant coefficient stiffness*, named k, which describes how stiff is the skin or how likely it is to deform.
Is Hooke’s law only for springs?
Hooke’s law is applicable not only to coil springs like the one shown here, but also to the bending of metal and some other materials, the stretching of wires like guitar strings, the stretching of rubber bands, and the stretching and compressing of chemical bonds.
What is the unit of spring constant?
Introduction To Spring Constant k is known as the spring constant or stiffness constant. Unit of spring constant is N/m.
How is Hooke’s Law derived?
Derivation of Hooke’s law By convention, the minus or negative sign is present in F= -kx. The restoring force F is proportional to the displacement x, according to Hooke’s law. When the spring is compressed, the coordinate of displacement x is negative. Zero when the spring is at its normal length.
What is K spring constant?
The spring constant, k, is a measure of the stiffness of the spring. It is different for different springs and materials. The larger the spring constant, the stiffer the spring and the more difficult it is to stretch.
How do you test for Hooke’s Law?
To investigate Hooke’s law , you can add masses to a spring and measure the length of the spring when the weight of the masses is increased. This experiment investigates Hooke’s law. To investigate how adding mass to a spring affects its extension.
What is elastic limit in physics?
elastic limit, maximum stress or force per unit area within a solid material that can arise before the onset of permanent deformation. When stresses up to the elastic limit are removed, the material resumes its original size and shape. Stresses beyond the elastic limit cause a material to yield or flow.
What is an elastic spring?
A spring is an example of an elastic object – when stretched, it exerts a restoring force which tends to bring it back to its original length. This restoring force is generally proportional to the amount of stretch, as described by Hooke’s Law.
What is Hooke’s law and its limitations?
A limitation to Hooke’s Law is that is it only applicable under the elastic limit of any material, which means that a material should be perfectly elastic to obey Hooke’s Law. Beyond the elastic limit the Hooke’s law essentially breaks down.
What is Hooke’s Law and show it graphically?
In mechanics (physics), Hooke’s law is an approximation of the response of elastic (i. e., springlike) bodies. It states the extension of a spring is in direct proportion with the load applied to it.
What is Hooke’s Law Toppr?
According to Hook’s law, body’s strain is directly proportional to the applied force, if the applied force is within an elastic limit. ∴stress∝Strain.
What is Hooke’s law for a spring?
Within certain limits, the force required to stretch an elastic object such as a metal spring is directly proportional to the extension of the spring. This is known as Hooke’s law and commonly written: F = − k x \boxedF=-kx F=−kx.
What is Hooke’s law for stress and strain?
There was a linear region where the force required to stretch the material was proportional to the extension of the material, known as Hooke’s Law. Hooke’s Law states that the strain of the material is proportional to the applied stress within the elastic limit of that material.
Where is Hooke’s law used in everyday life?
In addition to governing the behavior of springs, Hooke’s Law also applies in many other situations where an elastic body is deformed. These can include anything from inflating a balloon and pulling on a rubber band to measuring the amount of wind force is needed to make a tall building bend and sway.
Why is Hooke’s Law negative?
Explanation: Hooke’s law, as we know, expresses an object’s restoring force when subjected to an external force. Because it acts in the opposite direction as the applied force, the restoring force is considered negative in the calculations.
What is spring function?
The function of a spring is to absorb movement in the pipe caused by thermal and load displacements.
What is a spring force example?
When you jump on a trampoline, your body weight forces the trampoline downward, which further creates pressure in springs, generating a counterforce stored in springs that throws you upward.
What is the unit of elastic limit?
The material’s elastic limit or yield strength is the maximum stress that can arise before the onset of plastic deformation. Its SI unit is also the pascal (Pa).