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What are the differences between stress and strain??

Posted by Himanshu Shekhar 7 years, 3 months ago

2 answers

Gaurav Seth 7 years, 3 months ago

<div style="border:0px; margin:0px; padding:0in 5.4pt">S.no</div>	<div align="center" style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">Stress</div>	<div align="center" style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">Strain</div>
<div style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">1.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">Stress is defined as the resisting force per unit area.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">Strain is defined as the deformation per unit area.</div>
<div style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">2.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">The ratio of resisting force ( or applied load) to the cross section area of the body is called stress.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">The ratio of change in dimension of the body to the original dimension is called strain.</div>
<div style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">3.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">Stress is denoted by the Greek symbol ‘σ’ ( sigma).</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">Strain is denoted by the symbol ‘e’.</div>
<div style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">4.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">The formula of stress is given by</div> <div style="border:0px; margin:0px; padding:0in 5.4pt"> </div> <div style="border:0px; margin:0px; padding:0in 5.4pt"></div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">The formula of strain is given by</div> <div style="border:0px; margin:0px; padding:0in 5.4pt"> </div> <div class="separator" style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center"></div> <div style="border:0px; margin:0px; padding:0in 5.4pt"> </div>
<div style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">5.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">The unit<a href="http://www.mechanicalbooster.com/2016/09/units-of-stress.html" style="border:0px; font-variant:inherit; font-stretch:inherit; line-height:inherit; font-family:inherit; font-style:inherit; font-weight:inherit; margin:0px; outline:0px; padding:0px; vertical-align:baseline; color:#289dcc; text-decoration-line:none" target="_blank"> </a>of<a href="http://www.mechanicalbooster.com/2016/09/units-of-stress.html" style="border:0px; font-variant:inherit; font-stretch:inherit; line-height:inherit; font-family:inherit; font-style:inherit; font-weight:inherit; margin:0px; outline:0px; padding:0px; vertical-align:baseline; color:#289dcc; text-decoration-line:none" target="_blank"> </a>stress is N/m2 or N/mm2.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">Strain is a unitless quantity.</div>
<div style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">6.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">Stress can exist without strain.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">Strain cannot exist without stress.</div>
<div style="border:0px; margin:0px; padding:0in 5.4pt; text-align:center">7.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">The various types of stress are: tensile stress, compressive stress and shear stress.</div>	<div style="border:0px; margin:0px; padding:0in 5.4pt">The various types of strain are: tensile strain, compressive strain, shear strain and volumetric strain.</div>

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Yogita Ingle 7 years, 3 months ago

1.Stress is defined as a force that can cause a change in an object or a physical body while strain is the change in the form or shape of the object or physical body on which stress is applied.
2.Stress can occur without strain, but strain cannot occur with the absence of stress.
3.Stress can be measured and has a unit of measure while strain does not have any unit and, therefore, cannot be measured.
4.Strain is an object’s response to stress while stress is the force that can cause strain in an object.
5.Stress comes from the Latin word “strictus” which means “to draw tight” while “strain” comes from the Latin word “stringere” which means “to bind tightly.”

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What is meant by the term 'Radius of gyration'

Posted by Pratiksha Vinayak 7 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 7 years, 3 months ago

Radius of gyration or gyradius of a body about an axis of rotation is defined as the radial distance of a point from the axis of rotation at which, if whole mass of the body is assumed to be concentrated, its moment of inertia about the given axis would be the same as with its actual distribution of mass.

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What do you maen by pressure in a fluid.

Posted by Sujit Kumar 7 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 7 years, 3 months ago

Fluid pressure is a measurement of the force per unit area on a object in the fluid or on the surface of a closed container. This pressure can be caused by gravity, acceleration, or by forces outside a closed container. Since a fluid has no definite shape, its pressure applies in all directions.

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Considered a planner moving around a store in an elliptical Orbit with time t the area of elliptical is proportional to

Posted by Ishaan Sharma 7 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Vishal Rathore 7 years, 3 months ago

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One end of a copper rod of uniform croos section end of length 1.5 is in contact with the ice at 0'c and with water at 100'c . What point along the length of the rod should a temperature of 200'c be maintained so that mass of melting ice is equal to mass of steam produced in same interval of time ...

Posted by Nitika Bharti 7 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Discuss stress strain graph

Posted by Sahib Jeet 7 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Gaurav Seth 7 years, 3 months ago

The material, for which the stress-strain curve is to be plotted, is stretched by an applied force. The change in length (strain) of the material and the applied force are recorded. The applied force is gradually increased in steps and change in length is noted. The stress-strain graph is plotted between the stress (applied force per unit area) and the strain produced.

In the graph region between O to A, the curve is linear. In this region, the material obeys Hook’s law. The material regains its original dimensions when the applied force is removed. In this region, the material behaves like an elastic body.

In the region from A to B, stress and strain are not proportional. The point B in the curve is known as yield point (elastic limit). Corresponding stress is known as yield strength of the material.

If the load is increased further, the strain increases rapidly even for a small change in stress. The portion B to D shows this. At a particular point C, the body does not regain its original dimension. In this case, even if we made the stress zero, the strain will not be zero. The material is said to have a permanent set. The deformation is known as plastic deformation. The point D is known as ultimate tensile strength of the material. Beyond this point, even a small applied force causes additional strain to be produced and at the point E, fracture occurs. If points D and E are close, the material is known as brittle. If they are apart, the material is known as ductile.

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The force acting on an object of mass m travelling of velocity v in a circule of radius r is giving by f = mv 2 /r. The measurements recorded as m = 3.5kg ± 0.1 kg v = 20m/s ± 1m/s & r = 12.5m ± 0.5m find the maximum possible (i) fractional error (ii) percentage error in the measurement of force.

Posted by Manish Nain 7 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

What is Optics

Posted by Adnan Ansari 7 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 7 years, 3 months ago

Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it.Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties.

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The number of significant figures in 0.00630m2

Posted by Sahil Rajput 7 years, 3 months ago

CBSE > Class 11 > Physics

4 answers

Priya Dharshini ? 7 years, 3 months ago

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Manish Nain 7 years, 3 months ago

0Thank You

Neha Singh 7 years, 3 months ago

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Ankit Singh 7 years, 3 months ago

3 significant figure

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In a ballistics demonstratio a police officer fires a bullet of mass 50.0g with speed 200ms-1 on soft plywood of thickness 2.00cm. The bullet emerges with only 10% of its initial kinetic energy .what is the emergent speed of the bullet

Posted by D K 7 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

Carnot heat engine derivation

Posted by Parshant Badgujar 7 years, 3 months ago

CBSE > Class 11 > Physics

0 answers

ANSWER

When a body is in acceleration what is velocity

Posted by Lucky Singh 7 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Nancy Rajput 7 years, 3 months ago

velocity is zero

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Proof of keplers third law from gravitation

Posted by Gaurav Tripathi 7 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Ayushi Ayushi 7 years, 3 months ago

Note that Newtons law of gravitation was much much more fundamental than keplers third law of planetary motion intact the first aim of the gravitational law was to explain the falling Apple and keplers observation F=GMm/R2F=GMm/R2 where MM is mass of the sun and mm is mass of planet Roughly approximating a circular orbit GMm/R2=mv2/RGMm/R2=mv2/R v=(GM/R)−−−−−−−√v=(GM/R) T=(2πR)/vT=(2πR)/v T2=(4(π)2/GM)(R3)T2=(4(π)2/GM)(R3) T2=kR3 , thus, T2 is proportional to R3.

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Ishan Bhardwaj 7 years, 3 months ago

This Is also known as law of period according to the law the square of time period of rotation of a planet is proportional to the cube of semi Major axis of the ellipical radius of orbit T square is proportional to cube of radius

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Potential energy

Posted by Gaurav Tripathi 7 years, 3 months ago

CBSE > Class 11 > Physics

3 answers

Rakshak Purohit 7 years, 3 months ago

The energy of particle due to gravity

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Ayushi Ayushi 7 years, 3 months ago

Potential energy is that energy which an object has because of its position. It is called potential energy because it has the potential to be converted into other forms of energy, such as kinetic energy. Potential energy is usually denoted by the capital letter U in equations or sometimes by PE. Potential Energy Equations If you lift a mass m by h meters, its potential energy will be mgh, where g is the acceleration due to gravity. PE = mgh

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Ishan Bhardwaj 7 years, 3 months ago

The energy an object has because of its position, rather than its motion. And also a energy stored by something. Because of its position.

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What are the difference between weak nuclear force and strong nuclear force ..?

Posted by Rajat Solanki 7 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 7 years, 3 months ago

The Strong Nuclear Force is an attractive force between protons and neutrons that keep the nucleus together and the Weak Nuclear Force is responsible for the radioactive decay of certain nuclei. It was realized that the strength of the two forces differed a lot.

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Atomizer

Posted by Juli Roy 7 years, 3 months ago

CBSE > Class 11 > Physics

1 answers

Ayushi Ayushi 7 years, 3 months ago

An atomizer is a device which converts a stream of liquid into a fine spray. ... When someone wants to use the atomizer, they can squeeze a bulb attached to the atomizer or depress the top of the nozzle to create a flow of air across the nozzle which pulls the liquid up the tube and through the nozzle.

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what is real and virtual image

Posted by Nishant Pandey 7 years, 3 months ago

CBSE > Class 11 > Physics

2 answers

Ayushi Ayushi 7 years, 3 months ago

Virtual image - a virtual image is an image formed when the outgoing rays from a point on an object always diverge. The image appears to be located at the point of apparent divergence. Because the rays never really converge, a virtual image cannot be projected onto a screen.

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Ayushi Ayushi 7 years, 3 months ago

Real image- A real image occurs where rays converge. Real images can be produced by concave mirrors and converging lenses, only if the object is placed further away from the mirror/lens than the focal point and this real image is inverted.

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The position of a particle is given by r=3.0 t unit metre where t in seconds and cofficients have the proper units for r to be in metres. Find the velocity and acceleration of the particle.

Posted by Manish Nain 7 years, 3 months ago

CBSE > Class 11 > Physics