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What affects the kinetic energy of a trolley?

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Introduction

What affects the kinetic energy of a trolley? Aim: In this experiment I will be trying to find out the amount of starch that a potato chip has. Pre-Test Pre-test Results Mass start (g) Mass end (g) Mass change (g) Mass change (%) Average mass change (%) 0% A 3.91g 4.37g 0.46g 11.76% 11.20% B 4.14g 3.58g -0.44g -10.63% 20% A 3.97g 2.42g -1.55g -39.04% -32.28% B 3.88g 2.89g -0.99g -25.52% 40% A 3.92g 2.29g -1.63g -41.58% -44.29% B 4.17g 2.21g -1.96g -47.00% 60% A 4.08g 1.69g -2.39g -58.58% -58.08 B 4.05g 1.72g -2.33g -57.53% 80% A 4.17g 1.39g -2.78g -66.67% -63.33% B 4.00g 1.60g -2.40g -60.00% Plan: 1.) Cut 10 potato chips to a size, around 4cm long. Then weigh each potato chip and put them into pairs and tie a piece of string around on potato chip in each pair but making sure the string isn't tied too tight or too loosely around the chip. 2.) Now make five sugar concentrations and make one sugar solution at each different concentration: 0% sugar, 20% sugar, 40% sugar, 60% sugar and 80% sugar. 3.) Now place one pair of potato chips into each sugar solution. 4.) Leave the potato chips in the sugar solution for 24 hours. 5.) After 24 hours, re-weigh each potato chip and record it's new weight. 6.) Using the weights now work out the averages for the potato chips. ...read more.

Middle

2.) Then we'll weigh each chip on a ser of electronic scales and rounding it off to just 2 decimal places. 3.) We'll then tie a piece of red cotton around 5 chips and 5 pieces of red around another 5 chips. The reason we use cotton instead of pen or any other way of marking the chip is because it firstly causes the least damage to chip but it also covers the least surface area. 4.) Next we'll make 6 sugar solutions, from 0% to 25% going up in increments of 5%, places in 100ml of water in beakers all the same size. By making the beakers the same size you know that each one will have the sugar spread out evenly. 3.) Then the potato chips will be placed in each beaker at the same time, insuring that it will be a fair test. 4.) The beakers will then be left for 24 hours, giving them enough time to absorb or release water but not too long so they don't plasmolysed or become too turgid. 5.) After the 24 hours, we'll remove the potato chips from the water solutions and roll then on paper towel but not pressing down on them, just to remove any excess water off them. The reason we don't press on the chips is because if we did we might squeeze out water from inside them making the test unfair. ...read more.

Conclusion

If I was to continue this investigation any further or re-do the experiment I would like to look into testing it going up by 1% each time between 5% and 10%, and then I would have an even better idea of exactly what the amount of starch is inside the potato chip. Another thing I would of like to of done is to of maybe tried more potato chips instead of 3 maybe tried 5, which would help me in being able to reach a more exactly amount and would give me more reliable results because I would be able to work out a more accurate average. Finally I would also have liked to of looked into trying this experiment in a different place, say out of view of the sun from the window or in a place where I could set the temperature to a certain amount. The last thing I would like to change if I could do this experiment again is putting the potato chips at an angle or all lay across the bottom of the beakers, so then I would be able to get even more accurate results and not have some potato chips with more contact with the sugar solution than others (Like shown in diagrams). It would also help me get results which are more reliable. Daniel Cheetham - Science Biology - 1 - ...read more.

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