Block Slides Down Giant Globe in Italy

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In summary, the conversation is discussing a block sliding down a globe in Italy. The question is whether the globe has its own gravity, to which the answer is no. The Earth's gravity is used instead. The next question is about momentum, with the conclusion that the only force acting on the block is the Earth's gravity. The question also mentions centripetal acceleration, which is not zero because the block is traveling on a circular path before leaving the globe. The normal force is also discussed and determined to be zero because nothing is pushing the block up. Finally, the conversation mentions kinetic and potential energy, with the conclusion that the only choice is normal force.
  • #1
soupastupid
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Homework Statement


there is a block sliding down a big globe in Italy.


Homework Equations



uhh

The Attempt at a Solution



does the globe have its own gravity?

i'm thinking its A and C.
 

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  • #2
No, the globe doesn't have any significant gravity of it's own. Just use the Earth's gravity.
 
  • #3
and so it is a and c

becuz

once the block leaves the globe

nothing is pushing the box up (but friction) and nothing is slowing the box down in the horizontal direction (but friction)

and so the only force is the earth?

right?
 
  • #4
Yes, the only force is the Earth's gravity. (So no friction.)
 
  • #5
ok the next questions asks about about momentum

im thinking

centripital acceleration cannot be zero becuz

is it zero? i don't think so becuz its traveling on a circular path prior to leaving the globe

normal force must be zero becuz nothing is pushing up

the net acceleration is down and its velocity is going right and down

the kinetic energy cannot equal its potential energy becuz you cannot tell if the box is halfway down the globe right?

so the only choice is normal force right?

B
 

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1. What is the significance of the "Block Slides Down Giant Globe" in Italy?

The giant globe in Italy, also known as the "Sphere Within a Sphere" sculpture, is a symbol of peace and unity. It was created by Italian sculptor Arnaldo Pomodoro and was installed in 1990 in front of the UN headquarters in New York. The block sliding down the globe represents the fragility of our world and the constant need for protection and preservation.

2. How was the "Block Slides Down Giant Globe" sculpture created?

The sculpture was created using the lost-wax casting method. A smaller model of the sculpture was first created in clay, then a mold was made from the model. Molten bronze was poured into the mold and once cooled, the mold was removed to reveal the bronze sculpture. The final step was to add the polished stainless steel sphere on top of the bronze block.

3. What is the size of the "Block Slides Down Giant Globe" sculpture?

The bronze block is 3.5 meters high and the entire sculpture stands at 5 meters tall. The outer sphere has a diameter of 4 meters and the inner sphere is 2.5 meters in diameter. The sculpture weighs approximately 18 tons.

4. What is the condition of the "Block Slides Down Giant Globe" sculpture?

The sculpture has been well-maintained since its installation in 1990. However, in 2014, a small fragment of the outer sphere fell off. The sculpture was inspected and repaired, and a protective barrier was also added to prevent further damage.

5. Are there other versions of the "Block Slides Down Giant Globe" sculpture?

Yes, there are multiple versions of the "Sphere Within a Sphere" sculpture around the world, each with its own unique design and size. Some other locations where you can find this sculpture include the Vatican Museums in Rome, Italy, the United Nations Office in Vienna, Austria, and the Trinity College in Dublin, Ireland.

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