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

# Investigation of the structure of a cantilever beam.

Extracts from this document...

Introduction

PLANNING

AIM.

INVESTIGATION OF THE STRUCTURE OF A CANTILEVER BEAM.

APPARATUS LIST.

1. 3 Measuring rulers (1m each).
2. 10 Weights. (100g each)
3. 2 Wooden blocks.
4. Clamp.
5. Screw gauge with a sensitivity of 0.1mm
6. Vernia calapus with a sensitivity of 0.2mm

VARIABLES INVOLVED.

The variables that will be kept constant are the length of the overhang of the ruler, the position where the ruler is clamped and the position on the ruler where the weights are hung. The only variable that will change during the experiment is the amount of weight that is hung on one end of the ruler to measure the different deflection of the ruler at different heights. The weights that are hung on one end of the ruler will vary each time by adding 100g to the previous weight and read of the deflection of the ruler until it reaches 1kg.

METHOD.

Arrange the apparatus as shown in the above diagram. As the apparatus is fixed appropriately we can then start the experiment. As the apparatus is fixed we might see the ruler has a slight bend without any weights on it this is due to its own weight, this can be counted as a systematic error .Now I am going to start adding 100g weights to the ruler.

Middle

0.3

3.5

0.4

4.3

0.5

5.4

0.6

6.3

0.7

7.2

0.8

8.1

0.9

9.2

1.0

10.2

 Weight (kg) Deflection(cm) 0.1 1.4 0.2 2.7 0.3 3.5 0.4 4.4 0.5 5.4 0.6 6.3 0.7 7.4 0.8 8.2 0.9 9.2 1.0 10.2
 Weights(kg) Deflection(cm) 0.1 1.6 0.2 2.4 0.3 3.6 0.4 4.5 0.5 5.5 0.6 6.4 0.7 7.4 0.8 8.3 0.9 9.2 1.0 10.2

 Weights(kg) Deflection(cm) 0.1 1.53 0.2 2.58 0.3 3.50 0.4 4.40 0.5 5.43 0.6 6.30 0.7 7.33 0.8 8.20 0.9 9.18 1.0 10.25

These values are the average for all the above reading for the deflection of the ruler.

There were other values taken as well like the area of the ruler was measured with a screw gauge 3 times to give an average value.

The length of the overhang was approximately 70cm.

Conclusion

Throughout the experiment the same apparatus were used even for the repetitions. The only thing that varied during the repetitions was that I used different sides on the ruler to check that the deflections at each side were almost the same.

The method used for the above experiment was quite reliable. As the apparatus used were the same throughout the experiment.

To improve the method by which I carried out my experiment will be to use a screw gauge, which does not have a zero error. Fix a point on one end of the ruler for the weights to be hung so that there are no errors while reading the deflection of the ruler. Use a fixed length for the overhang. Initially see that the ruler does not have bend, if it does use a similar ruler with the same amount of bend length to place it next to the ruler on which weights are hung to get an accurate reading for the deflection.

The experiment was done fairly accurately and gave me a set of results that were fairly accurate and were similar to my prediction, which I made from reference. So I think this method of doing this experiment was fairly good.

Reference: Understanding physics for advanced level by Jim Breithaupt.

This student written piece of work is one of many that can be found in our AS and A Level Waves & Cosmology 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

# Related AS and A Level Waves & Cosmology essays

1. ## Determine the value of 'g', where 'g' is the acceleration due to gravity.

to find the minimum and maximum points from which I am going to get the gradient. To find the maximum point you add the error to the original point and to find the minimum point you subtract the error from the original point.

2. ## Making sense of data - finding a value for the young modulus of a ...

Modulus there were errors, although quite minimal, in the constants used in the original equation which calculates the Young's Modulus value. Below I will show the percentage errors for each constant:- B = 0.001/5.6718 = 0.017% D = 0.001/3.024 = 0.033% D3 = 3 x D = 0.099% L =

1. ## Our Universe as a Laboratory for Understanding Physical Laws

What if we created dark energy so we would not have to face the slight chance that gravity may behave differently on large scales? Gravity is arguably the most important of the 4 known fundamental forces. If we don't even fully understand gravity, how can we justify saying that the

2. ## An experiment to investigate and determine how rubber behaves when tension forces are applied ...

A stand so that I can fit my g-clamp to this. 3. A g-clamp to hold a suitable sized nail for the rubber band to fit around. 4. A large nail for the rubber band to rest upon. 5.

1. ## I am doing an investigation in to how much a metre rule bends when ...

But if (g) and height remain constant and the mass becomes 1000g (1kg) then the gravitational potential energy = 1kg x 10N x 90cm (0.9m) = 9 joules. This also proves that the greater the mass, the more the rule will be inclined to bend as there is a greater

2. ## Experiment to measure deflection when a force is applied to a cantilever.

Stress is defined as the tension (force) per unit area applied normal to that area. Strain is defined as the extension per unit length. 1. Stress is proportional to strain up to the limit of proportionality, P. The gradient OP is equal to the Young Modulus. 2.

1. ## In this experiment I aim to find a value for the Young's Modulus of ...

Gradient x length Area There are many externalities, which could affect the results from this experiment. The length of the tape, temperature of the room, cross sectional area of tape, material that the tape is made from and even the pressure in the room, are all factors that may distort my findings.

2. ## Waves and Cosmology - AQA GCE Physics Revision Notes

The Earth is at a temperature of about 300 K emits mostly infrared radiation and the Sun mostly emits visible light. At the left side of the scale, the wavelength is relatively shorter, therefore the star would appear blue (the peak would also be higher as the intensity also increase.) • Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to 