Chrunchie-bone replacement Investigation.

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Steve Lansdowne

Chrunchie-bone replacement Investigation

Investigation

During this experiment I wish to expand my knowledge of how bones within the body are damaged or effected at all by a force and how much force is needed to take an effect I will be using a crunchie bar to take the place of the bone as they are structurally very similar- a honey comb style.

  I will be testing:

  • Different weights acting on crunchie and effect on compression
  • Surface area (size of face touching base and weight)
  • Height of material
  • Effect of removing chocolate coating of crunchie

Equipment

  • 1kg weights
  • Micrometer
  • Vernier calliper
  • 2 pieces of hardboard
  • 3 crunchie bars
  • Knife
  • Stop watch

Method

For this experiment I will firstly cut the required piece of crunchie bar to size making sure it is very precise and flat edges so no gaps etc in the side. Remove any chocolate if necessary this must be done very carefully and no chocolate left, again leaving flat edges with no broken ends or split edges.

Then before any weight is added the piece must be accurately measured using the micrometer which is accurate to milli meters and a small scale venire calliper. This is recorded so three measurements will be produced, width, length and height. The piece of crunchie will then be placed on the flat surface of the hardboard and a piece on top to stop weights pushing unevenly. Weight is then added in amounts of 1kg at a time and left for 10 seconds so any compression can take place. After each weight being added the board is removed and crunchie piece re-measured and results recorded. This process will be repeated each time for every piece of crunchie up to around 10kg due to resources.

Safety

 This experiment could be potentially dangerous due to a lot of weight being piled up quite high, precautions must be taken in case of these falling and landing on someone’s foot etc or damaging equipment. More than one person must assist in the experiment to help steady the weight if is proving to be top heavy, and another technique must be found to place weights if proves to be too difficult to conduct safely.

Fair Test

The same set of micrometer and Venire calliper must be used each time due to faults within the equipment, at least if the same fault is being made each time the experiment will not be too out due to the same result alteration each time. Same weights must also be used each time due to slight alterations in weight. Must be accurate with letting the weight take effect over a 10 second time period or compression may be higher if left too long. Check to make sure that the crunchie bars are the same in thickness etc and aeration is the same or crunchie structure will differ in strength.

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Implementation

I have recorded my results in tables and drawn graphs to display the information clearly.

Experiment 1

In these experiments I have tested the effect of different weights on a crunchie with and without chocolate on to see the effect on amount of compression  

With Chocolate:

Without Chocolate:

From this experiment it can be derived that the maximum weight before collapsing is around 9kg whether the chocolate is on or off, and the actual compression is very minimal, only around 3mm. So for my future experiments I shall ...

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