What is meant by the elastic limit for a particular object?
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.
Why do we say a spring is elastic?
Why do we say that a spring is elastic? When deformed, it returns to its original shape. … When deformed, it does not return to its original shape. If a 1-kg object stretches a spring by 2 cm, then how much will the spring be stretched when it supports a 3-kg object? (Assume the spring does not reach its elastic limit.)
What and where is the neutral layer in a beam that supports a load?
What and where is the neutral layer in a beam that supports a load? The neutral layer beam is the region of neither tension nor compression when supporting a load: it is in the middle portion of the beam.
What is Hooke’s Law simple explanation?
Hooke’s Law is a principle of physics that states that the that the force needed to extend or compress a spring by some distance is proportional to that distance. … In addition to governing the behavior of springs, Hooke’s Law also applies in many other situations where an elastic body is deformed.
What is the formula of elastic limit?
In equation form, Hooke’s law is given by F=kΔL F = k Δ L , where ΔL is the change in length. Elasticity is a measure of how difficult it is to stretch an object. In other words it is a measure of how small k is. Very elastic materials like rubber have small k and thus will stretch a lot with only a small force.
Why are some materials elastic?
Solid objects will deform when adequate loads are applied to them; if the material is elastic, the object will return to its initial shape and size after removal. … For rubbers and other polymers, elasticity is caused by the stretching of polymer chains when forces are applied.
Does Hooke’s law apply to all materials?
Hooke’s law only holds for some materials under certain loading conditions. Steel exhibits linear-elastic behavior in most engineering applications; Hooke’s law is valid for it throughout its elastic range (i.e., for stresses below the yield strength).
What objects obey Hooke’s Law?
Hooke’s Law states that, for certain elastic materials, force is proportional to extension, when a sample is stretched. This means that the extension of the sample increases linearly with the amount of force applied. Materials that obey Hooke’s law are called Hookean Materials. Springs behave like Hookean Materials.
Why can small creatures fall considerable distances without injury while people need parachutes to do the same?
Why can small creatures fall considerable distances without injury, while people need parachutes to do the same? A small creature has greater surface area per unit mass, so air resistance slows it more when it falls.
What is the evidence that steel is elastic?
The evidence that steel is elastic is that it returns to its original shape when bent. The evidence that putty is inelastic is that it does not return to its original shape when deformed.
What is an elastic limit?
A material’s elastic limit is the greatest stress that can be applied to it without causing plastic (permanent) deformation. When a material is stressed to a point below its elastic limit, it will return to its original length once the stress is removed.
What happens to the density of a uniform piece of wood if it is cut in half?
When a uniform piece of wood is cut in half, its density stays the same. The cut piece of wood has half the mass (or half the weight), but it also has half the volume. Density = mass (or weight) divided by volume.
How is Hooke’s Law verified?
Here k is the spring constant which is a quality of each spring. Therefore, in order to verify Hooke’s Law, you must verify that the force F and the distance at which the spring is stretched are proportional to each other (that just means linearly dependent on each other), and that the constant of proportionality is k.
What is the aim of Hooke’s law experiment?
Aim of the experiment
Hooke’s law states that the extension of a spring is directly proportional to the force applied, provided that the elastic limit is not exceeded. The aim of the experiment is to investigate the relationship between a force and the extension of a spring, and see if the spring obeys Hooke’s law.