• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

D2 Measurong Young's modulus of copper(TAS)

Extracts from this document...

Introduction

D2 Measurong Young's modulus of copper(TAS)

Objective

In this experiment, The Young's modulus of copper will be mesured .

Apparatus

- copper wire   4m

- G-clamp
- polley on clamp

-2*Wooden block

- 2*rule (half meter and meter rule)

- slotted mass with hanger 15 * 0.1 kg

- adhesive label
-micrometer screw gauge
-safety goggles  
-polystyrene board


(
Warning : Wear safety goggles when doing this experiment )

Theory

When a spring is stretched or compressed by a force.The extension is directly proportional to the applied force.This relationship known as Hooke's law.
Force=ke.However,the law is used when the proportional limit is not exceeded.To further investigate how the material behaves when it is stressed,we define:

The stress applied to the wire is defined as the force applied per unit cross-sectional area.
                 
Stress = force per unit area =F/A    

(where F is the force or tension in the wire, A is the cross-sectional area)

When the wire being stretched,it is under strain.The strain is defined as the extension per unit length.
               

...read more.

Middle

nd measurement

3rd measurement

Diameter d/m

0.00028

0.00028

0.000275

Mean diameter of wire d = 0.000278 m

Original length of wire l = 3.95 m

Load m/kg

0

0.1

0.2

0.3

0.4

0.5

0.6

Extension e/m

0

0.001

0.002

0.0025

0.0028

0.003

0.0038

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

0.0042

0.005

0.007

0.009

0.015

0.036

0.087

0.155

Before the load increase to 0.7 kg.The extension is nearly proportional to the force .Also stress is nearly proprtional to strain.After the load is beyond 0.7kg,extension is not proportional to force and stree is not proportional to strain.The plastic deformation occur.The wire does not return completely to its original length .The wire broke whn the load is increase to 1.4 kg.

This part of graph obeys Hooke’s law.

Fig. 4

% strain = extension / original length x 100%

= 0.0042/ 3.95x 100%

       = 0.106%

Fig.

...read more.

Conclusion

safety goggles when doing this experiment.It can protect our eye is hited by the wire.

Young's modulus is more useful than force constant because the Young's modulus depend on the force per unit cross sectional area.Also,the extension is per unit length.It is more accuracy than the force constant which is only depend on the relationship between the force and extension.

From the book called NEW WAY PHYSICS.the young's modulus of the copper is
124x109 Pa.

Also from
http://www.answers.com/topic/young-s-modulus.
the Young's modulus is between110 to 130 x109 Pa.
Compare with our result.It is 124x10
9 Pa.The answer is very close to the reference answer.It is because we take all of the value very carefullyand seriously for decrease the error.

Conclusion


The Young's modulus is depend on the materials.The Young modulus of copper which measure by our group is
124x109 Pa

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Mechanics & Radioactivity section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Mechanics & Radioactivity essays

  1. Copper Young's modulus

    - A metre rule was fixed alongside the wire with the maker for measuring the extension. Performance of the experiment 1. The hanger was tied to the end of the wire so as to straighten out the kinks in the wire and the unstretched length (lo)

  2. Young Modulus of Copper

    against ? ) . For a non brittle material, usually there are two stages of deformation before breaking. Stage 1 : Elastic deformation In this stage, the wire would return to its natural length when the stress is removed. Hooke's law is usually obeyed in this stage, therefore the graph is almost a straight line.

  1. Use of technology in a hospital radiology department. The department of imaging is one ...

    Beta and gamma radiation are not as dangerous because they are less likely to be absorbed by cell and usually just pass right through it. However if the radioactive source is out side the body alpha radiation is not as dangerous because it is unlikely to reach living cells inside the body.

  2. Young's Modulus of Nylon

    At each stage of the experiment I will take readings of length using a standard 1m ruler, and will measure the area of a cross section by gathering the diameter value using a micrometer, halving this value to gather radius and then use the formula Before any weights are added,

  1. The physics involved with a rollercoaster.

    However, no matter what happens to its weight the rock's mass would never change. Mass measurement is unaffected by the pull of gravity. Most roller coasters keep the g's felt under 5 g's on an inside loop or the bottom of a dip after a hill.

  2. Calculating the Young Modulus of Constanton

    Method To measure the Young's modulus of constanton I will: 1) Set up the equipment as shown. 2) Choose a suitable section of wire from the real that doesn't appear bent, twisted or deformed. Measure the diameter of the wire with a micrometer before attaching it to the weights. 3)

  1. Given a Batch of Factory Springs, Estimate the Average Spring Constant and Uncertainty of ...

    was not a factor, the equipment I had was not all compatible. This would produce results that were not accurate enough to exceed those of the experiment above because of this problem. This would have been the alternative experiment: Error identification Random My ruler only measures to the nearest 0.001m

  2. The Physics of an Atomic Bomb

    Once the shock wave is transmitted to the fissionable core it compresses the core and raises the density to the point of supercriticality which then leads to a great explosion. Essentially what is happening here is that the fissionable mass is crushed to a great density, and once the mass has reached that supercritical density it goes off.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work