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.


 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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