Forces on an object immersed in water

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  • Created by: Jenna k
  • Created on: 31-03-14 17:56

Forces on an object immersed in water PSA

What I had to do was to set up a clamp stand and a boss and clamp, from which I hung two connected springs. From that I hung a 500 gram mass made up of 100 gram masses. This had to be bearly immersed in water, with the jaws of the clam shut. I then measured the extention of the springs (L) and the depth of the weight in the water (D). We then had to repeat this, while the clamp was slowly opening. I ended up with 6 values which it asked for.

Then we had to draw a curved graph for the values which showed a negitive trend. Meaning as the weight was being emersed in the water the springs were getting shorter. I found the gradient and the y intersept and I had to put it into a graphical function (one of those equations that looks like it doesnt belong in a test paper). Finally I had to say why I used 2 sig fig.

The first couple questions asked to measure the diamiter of the masses base. To do this you dont uses a ruler (like I did) you use a vernier caliper, which you should take an average from and it should give you a decimal place answer. Then I had to use this to find the area of the base of the mass so I could use this value in the graphical eqaution.

Evalutating this task.

Equipment:

 The vernier capilers only measure to the nearest millimenter which is quite accurate.

When the masses were submerged in the water it was very difficult to estimate the…

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