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Testing Hooke? s Law Essay, Research Paper

Hooke? s Law is when forces are applied to a solid object and

it can ensue in extension or compaction. ?

Hooke? s Law is able to foretell how a spring ( or other stretchy

object ) would act when force is applied to it.I purpose to demo how much force ( N ) strips of supermarket

plastic bags will take before it reaches its elastic bound and whether the

breadth of the strips can change the results.I am traveling to make a simple experiment that involves cutting a

plastic bag into strips which are all different sizes, 25cm ten 5cm, 25cm ten 10 centimeter

and 25cm ten 15cm. ? Then I am traveling to add 100g weights to the length of plastic

bag until I reach its elastic limit. ? After each 100g has been added I am traveling to mensurate the new

length of the plastic bag strip. I will so observe the difference between the length of the

strip at the start of the experiment and the length at the terminal in order to see

what lasting harm has been done. ? To do it a just trial I will utilize the same types of plastic

bags and do certain that they are ever the same length. ? I will besides seek to gently add the weight so that the force

with which it landed does non change the results.The most of import factors are that I make certain that it is a

just trial and that I take accurate measurements.I will necessitate to take measurings in centimeters after every

100g is added.The ground I should obtain accurate consequences is because I

cognize that the strip should stretch at equal sums until the strips have been

stretched beyond their elastic bound. I will hold to be careful to do certain that if the strip of

plastic bag breaks the falling weight could non be a danger to anyone. ? I

will be taking minor safeguards and shall non be adding farcical sums of

weight onto the beam.

The measurings that I will be taking must be done every bit reasonably as possible or

the consequences shall non be accurate. ?

The equipment that I will utilize should be checked to do certain that there is

nil incorrect with it ; I will do certain that I use the best equipment available

to me. ? Diagram Equipment list Clamp and Stand Weights ( In different

proportions ) A mensurating apparatu

s

( Ruler ) Plastic bag strip Prediction I believe that the different breadths will somewhat change the

results. ? This is because the force

remains equal but there are more molecules contained in a larger surface ( wider

strip ) than there are in a smaller 1. ?

The 25cm x 5cm length of plastic bag will make its elastic

bound earlier than either of the other too.The 25cm ten 15cm length should be able to defy the

largest sum of weight before making its elastic limit.The consequences should stay consistent and addition in even

sums until the chosen strip reaches its elastic limit.Results? ? ? ? ? ? ? ? ? ? ? 25cm

x 5cm? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 25cm x 10cm? ? ? ? ? ? ? ? ? ? ? ? ? ? 25cm x 15cm Force applied ( gms ) Length addition ( Cm ) Length addition ( Cm ) Length addition ( Cm ) 100 30 30 30 200 30 30 30 300 31 31 31 400 31 31 31 500 32 32 32 600 32 32 32 700 33 33 33 800 35 33 33 900 42 34 34 1000 43 34 34 1100 Snapped 37 35 1200 38 35 1300 42 36 1400 48 36 1500 Snapped 37 1600 41 1700 43 1800 45 1900 49 2000 Snapped? ? Conclusion My anticipation was right. ?

The difference in breadth did impact the elastic point on the plastic bag

strips. ? Due to holding precognition of Hooke? s Law it was easy to

approximately predict what the consequences were traveling to be. ? Besides being cognizant of the motion in molecules that are found

in solids was helpful. ? This helped me

come to the decision that due to the sum of force per unit area on certain parts of

the strip a wider strip would be able to defy more pulling from the

weights. ? Algebraic expression Force? ? ? ? & gt ; ? ? ?

Strip Strip will stretch by? X? sum Double force = ? 2X? So? F & gt ; S S x X 2F = 2XEvaluation The experiment managed to bring forth some decent, accurate

consequences so that I was able to bring forth a graph and come to a good

conclusion. ? All of my consequences seemed to be really accurate. ? They all followed a form until they reached

the elastic point. ? After they had hit the elastic point the consequences became

harder to record because they were so varied. ?

Besides some of the measurings could hold been somewhat inaccurate

because I was utilizing a 30cm ruler.To make certain that all my consequences were accurate I would hold

to hold more clip and be able to reiterate them once more.

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