The Effect of Applying Weight to an Elastic Band and How it Affects the Length it Stretches To
Aim
In this coursework I will be investigating the effect of applying
weight to an elastic band and how much this affects the length it
stretches to. This will also involve the use of Hooke’s Law and the
Simple Harmonic Motion. I will do in-depth research on Hooke’s Law and
how the force applied affects the change in length of a material.
The apparatus I will be using is listed below:
1. Retort Stand – I will connect this to the clamp
2. Clamp – I will use this with the retort stand to suspend the
elastic band from it
3. Slotted Weights – these will be used to apply different amounts
of forces
4. Rubber Bands (3 of different lengths and thickness) – I will use
these to test Hooke’s Law of elasticity
5. Ruler – to measure the change in elasticity
6. A string – to ensure accurate results when measuring
My Plan
I will start off by suspending a rubber band from the retort stand; I
will then apply different forces to the rubber band and see how the
elasticity changes, with respect to the weight applied. I will measure
the elasticity using the string and then see by how much the
elasticity has changed. I will keep applying weights increasing in 10g
until 100g is reached.
In my experiment I will be varying the rubber band I use hence this is
my independent variable and my results rely on this factor. Each time
I will use a rubber band of different thickness and length. Another
independent variable will be the mass or the weight I apply to the
rubber band. The dependant variable will be t...
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...mmonly the case.
Besides the slotted weights may not have been perfectly accurate as
chips could have come off from the ends if and when they fell.
Therefore digital weights would be a much better option. I could also
have ensured the accuracy of my results by using a drawing pin and
attaching it to the retort stand to get a clearer picture of the
amount the band has stretched by.
Further work could be done by using simple harmonic motion. This could
be used as a back-up for finding the constant used in Hooke’s law.
This could be done by measuring the time taken for an oscillation to
occur when force is applied to the band. The reason why I did not do
this in my actual investigation was due to the lack of the equipment
required. A retort stand could not, exactly, be used as you cannot
oscillate an object from it.
to get an idea of how I would do my real experiment and what apparatus
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