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Finding the Young’s Modulus and Breaking
Stress of fishing line.
In this experiment we are trying to find out what the Young Modulus of a length of fishing wire is and the breaking stress of the same wire. I’ll do this by attaching some weights to the end the fishing wire which is vertically suspended in the air and keep adding weights in small increments until the wire snaps.
Prediction
After doing some research I have found out that the Young Modulus of fishing wire is around 2. ... 5×109 Nm-2 or Pascal’s (Pa). The equation for the Young Modulus of a material is E= Fl/∆хA. Where E is the Young Modulus, F is the force that gives a certain extension ∆x, l is the original length of wire and A is the cross-sectional area of the wire.
If I do the experiment correctly then the answer that I get for the Young Modulus should be within this range of values. ... I think this because the wire has a 3lbs breaking stress and when you divide that by 2.2, as that’s how many pounds are in a kilo, you get 1. ... When I draw a graph of Force against Extension to show my results there should be a straight line up to the limit of proportionality when Force and Extension are directly proportional to each other obeying Hooke’s Law, after this the graph should tail off with a smooth curve. From this part of the graph I can work out the gradient and then that can be used in the equation to work out the Young Modulus, the equation would then become E= gradient × l/A.
The stress on the fishing wire is going to be very high. The equation for stress is θ= F/A, the area of the fishing wire is very small this will make the stress on the material very large. The breaking stress for fishing wire is around 3lbs which is approximately 1. ... 0m of Fishing Wire
Micrometer Metre Rules
Clamp Stands 100g Masses
10g Masses Wooden Blocks
Padding
Diagram
Method
I the experiment I’m going to add extra masses onto the fishing wire each time until the wire snaps.
Approximate Word count = 1853
Approximate Pages = 7.4
(250 words per page double spaced)
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