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

An investigation into the relationship between the force applied on a cantilever and its deflection.

Extracts from this document...

Introduction

An investigation into the relationship between the force applied on a cantilever and its deflection

I aim to investigate the relationship between the force applied on a cantilever and its deflection.

Research – A cantilever is a projecting structure such as a beam, which is supported at one end and carries a load at the other end or along its length.

To measure the deflection, I will place a ruler, vertically at the end of the cantilever with the force applied. I will record the amount of deflection with no force (only gravity) and calculate the difference.

Before I did the experiment, I carried out some preliminary work so that I could find out the best length of the cantilever, material of the cantilever, and maximum and minimum force applied to the cantilever.

I learnt from my preliminary experiment what my ranges should be and how many results I would need to prove my prediction. Also I learned how to set up my apparatus and how big or small my overhang should be.

I chose to use a meter ruler for my cantilever, as it is a widely available object to use and it is already marked in measurements.

I will use a wooden meter ruler, as it can take more force that a plastic one, I know this from my preliminary work.

I will use a maximum load of 7 Newtons (700 grams)

...read more.

Middle

0.00

168

0

1.00

203

035.00

2.00

233

065.00

3.00

267

099.00

4.00

282

114.00

5.00

316

148.00

6.00

331

163.00

7.00

365

197.00

Set 2

Force applied (N)

Deflection (mm)

Difference (mm)

0.00

172

0

1.00

198

026.00

2.00

224

052.00

3.00

251

079.00

4.00

276

104.00

5.00

302

130.00

6.00

326

154.00

7.00

350

178.00

Set 3

Force applied (N)

...read more.

Conclusion

Evaluation –

My procedure was good enough to make my measurements reliable as I got another person to read them as well as me.

I can tell that my results are reliable as my line of best fit is a straight one which passes through the point 0, 0 and all of the points lie close to the line of best fit. I can tell that they are also reliable as they graph agrees with Hook’s law.

I did not have any anomalous results in my investigation as all of my results fit in with my pattern.

From the above, I believe that my results were accurate enough, although if I was to do the investigation again I would take more results at more regular intervals. E.g. Every 0.5 N so that my results were even more accurate because I would be taking more results.

My graph shows me what I needed to see, but if I had more results, I would be able to see a better line. This would allow me to get a better conclusion of my results. From my graph I can see that when the force is doubled so is the deflection.

Overall, I believe that my investigation was conclusive enough for what I wanted to know but could have been more accurate if I wanted it to be. My results show that the deflection is directly related to the Force, and that when the force is doubled the deflection is doubled this agrees with Hook’s law.

Jack Cummins 10LB

...read more.

This student written piece of work is one of many that can be found in our GCSE Forces and Motion 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 GCSE Forces and Motion essays

  1. Marked by a teacher

    Investigating a Cantilever.

    4 star(s)

    mass' of 100-500g at 100g intervals G-Cramp Cantilever Pin Mirror Ruler We are going to fix the cantilever to the lab bench at a length of 500mm using the cramp. The pin will be fixed to the end of the cantilever so as to give accuracy in the taking of the results.

  2. In this experiment I aim to find out how the force and mass affect ...

    Air resistance acts on everything that moves through the air and is a force that opposes motion, i.e. it makes a moving body slow down. Some shapes result in less air resistance than others - a feather experiences much, and a coin very little.

  1. Practical Investigation Into Viscosity

    dyne = gcm/s2 vk = Kinetic in Stokes (vd /d) Re = Reynolds number THEN Re = 2r d s/ vd cm cm g s2 cm2 / g cm s s cm3 (all units cancel out) Or because stokes = vd /d Re = 2rs/ vk Well what does a Reynolds number mean?

  2. Squash Ball and Temperature Investigation

    These will all be incorporated in my final method as shown below: 1. Collect the required equipment (mentioned in the apparatus section). 2. Fill a large beaker half way up with hot water and using a thermometer make sure it's at 850C.

  1. Physics investigation into the bending of a Cantilever.

    16 y = 32 Doubling F therefore shows y to be proportional as it also doubles proving my prediction to be correct. ==> This prediction was based on scientific knowledge and theories such as Hooke's law. Hooke's law states that the length of a spring stretches is directly proportional to

  2. Friction Investigation

    weight pushing the two surfaces together is directly proportional to the friction that occurs. And also, the roughness of the surfaces will affect friction, because if the surfaces are rougher, then the imperfections will be greater in size, and so the "welded" junctions that will occur when these imperfections join

  1. The Helicopter Investigation

    He also discovered that in most changes of Velocity, more than one force is acting on the accelerated object, such concurrent forces produce a signal net force. If the force pushing down on the helicopter is greater than the upwards draft, there will be a net force in the downward direction, therefore the helicopter will accelerate in that direction.

  2. Controlled Assesment Experiment - The extension of a rubber band depends on the force ...

    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 its original length when we remove the force. Beyond the elastic limit, we say that it shows "plastic behaviour".

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