2 - Law of Archimedes - applet

Do you use an iPad? Then open this exercise in the Puffin browser   .

 

You will conduct research into the: Law of Archimedes​

  1. Click on the image to open the applet.

 

2. Set the settings at the bottom left of the applet as shown opposite.
    Check mark for: Gravity on.
    Check mark for: Float on.

    Checkmark: Masses off.
    Check for: Size of the forces.

 

 

3. Place the wooden block on the scale.
What is the gravity (= weight) of the wooden block?

4. How many liters of water is in the container?

5. Put the wooden block in the water container.
Does the wooden block sink, float or float?

6. The water in the container has become higher (volume is larger).
That is because the block of liquid pushes away.
Calculate the volume of the pushed (displaced) fluid.

7. How large is the upward force?

8. What conclusion can you draw from this study about the upward force?
Begin your answer with:
Als een voorwerp drijft dan ...

9. Remove the wooden block from the bin.

 

10. Determine the gravity (= weight) of the stone block?

11. Put the stone block in the water container.
Does the stone block sink, float or float?

12. The water in the container has become higher (volume is larger).
Calculate the volume of the fluid being moved.

13. How large is the upward force?

14. What conclusion can you draw from this research?
Begin your answer with: If an item sinks then ...

 

15. Remove the stone block from the container.


16. Place the liquid under the applet: Oil.

The density of water is 1 g / cm³.
The density of oil is rounded 0.92 g / cm³.
So oil is slightly lighter than water per cm³.
You are now going to investigate what influence a smaller density has on the upward force.


17. Put the wooden block in the oil container.
Does the wooden block sink, float or float?

18. Calculate the volume of the fluid being transferred.

19. How large is the upward force?

20. After this investigation you can say something about it

a. What conclusion can you draw from this research about the volume of the fluid being transferred?
b. What conclusion can you draw from this research on upward force?

21. Remove the wooden block from the bin.

 

22. Put the stone block in the oil container.
Does the stone block sink, float or float?

23. Calculate the volume of the fluid being transferred.

24. How large is the upward force?

25. After this investigation you can say something about it

      a. What conclusion can you draw from this research about the volume of the fluid being transferred?
      b. What conclusion can you draw from this research on upward force?

 

26. Click in the applet at the top left on:


27. Set the settings in the lower left corner of the applet as shown opposite.
      Check mark for: Gravity on.
      Check mark for: Float on.

      Checkmark: Masses off.
      Checkmark for: Size of the forces on.

 

 

You are now going to investigate what influence it has when an object and the liquid have an equal density.

In the applet you can see on the top left that the density of wood is 0.4 kg / L.

We prefer to use the unit for density: g / cm3.
You can convert kg/L to g/cm3.
A liter (L) is equal to a dm3 which means you can say: 0.4 kg/L = 0.4 kg/dm3.
A kg equals 1000 g and a dm3 equals 1000 cm3.
Since you can divide 1000 by 1000 you can say 0.4 kg/dm3 = 0.4 g/cm3.


28. Click at the bottom of the applet in the area where the number represents the density of the liquid.

29. Change the number 1.00 by the number 0.4 (In this applet, type 0 point 4 instead of 0 comma 4).

You have now made the density of the liquid equal to the density of the object (the wooden block).

30. Place the block on the scale. What is the weight of the block?

31. Place the wooden block in the container with liquid.
  The block must not touch the bottom!
     Does the wooden block sink, float or float?


32. Calculate the volume of the fluid being transferred.

33. How large is the upward force?

34. Place the block on the scale that is at the bottom of the bin.
a. What value does the scale indicate?
b. Give an explanation for this.

35. After this investigation you can say something about it

volume of the fluid being moved
the upward force.
a. What conclusion can you draw from this research about the volume of the fluid being transferred?
b. What conclusion can you draw from this research about the upward force of an object that is floating?

In summary, the Law of Archimedes is:
the upward force is equal to the weight of the amount of fluid displaced.