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# Fishing wire investigation

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Introduction

Fishing wire investigation The Basics Fishing wire is used to (obviously) catch fish, it is attached to a fishing rod, using a Fisherman's Knot which is how I will be using to attach the 100g weights and to the retort stand, this will keep the experiment as fair as possible, also I would use 100g weights as the schools supplies of smaller weights and limited. So I wil add the weights in 100g chunks. Aim To find the tensile strength of fishing wire by attaching weights to the bottom. Prediction I predict that the wire will snap at around 600g because that is what the manufacturers say is the maximum weight is. ...read more.

Middle

Attach the universal clamp to the retort stand(End is over the edge of the table) 4. Lay the mat down directly below the end of the universal clamp (To reduce damage to the floor) 5. Cut 20cm of fishing wire 6. Tie the fishing wire over the end of the universal clamp (Try to use a fishing knot, as it will give a more accurate result) 7. Connect a 100g weight to the end 8. Keep adding weights until the wire breaks 9. Repeat steps 5,6,7 and 8 Results Length of wire (cm) Weight needed to snap (G) 20 200 22 500 21 400 21 400 Graph Analysis We used a fishing wire that should withstand 600g, as you can see it didn't. ...read more.

Conclusion

keep the length of wire the same each time because the knot would change size each time, also the knots took us a while to tie as they were very small, and therefore we only got four tests in. The tensile strength on the packet said it was 600g but we didn't get that any of the times, this could be because it would be attached to a fishing rod, which would bend with the string whereas the universal clamp was clamped straight. I would improve it by having somebody in our group that could tie a fishing knot accurately, doing more tests, using a material more like a fishing rod and using smaller weights to add more accuracy. ...read more.

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