Questions on Newton's Law of Gravitation

In summary, the conversation discusses the gravitational force between a ring and a rod, as well as between a disk and a rod, with a given distance between them. The process for calculating this force involves using a double integral and considering the geometry of the objects involved. More details and instructions can be found in the provided link.
  • #1
toutou
6
0
hi i have some questions about Newtons law of gravitation and i need complete answers coz these qwestion will be my second exam:
1.the gravitational force between a ring of raduis a and mass m and a rod of mass m and length l lies on the central axis of the ring and the distance is x between them
2.the gravitational force between a disk of raduis a and mass m and a rod of mass m and length l lies on the central axis of the disk and the distance is x between them
by using double integral
 
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  • #2
You'll need to show some work first...as described in https://www.physicsforums.com/showthread.php?t=94379 .
 
  • #3
This is basically the same procedure Dick and I laid out for you in a previous thread. The additional considerations are the geometry of the ring and disk rather than the rod.
 

FAQ: Questions on Newton's Law of Gravitation

What is Newton's Law of Gravitation?

Newton's Law of Gravitation is a physical law that states that any two objects in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

How did Newton discover this law?

Newton discovered this law through his observations of the motion of the moon and the planets, as well as his experiments with falling objects. He also used mathematical calculations and equations to support his findings.

How does Newton's Law of Gravitation relate to other laws of motion?

Newton's Law of Gravitation is one of the three laws of motion that he developed. It specifically relates to the first law, also known as the law of inertia, which states that an object at rest will remain at rest and an object in motion will remain in motion unless acted upon by an external force.

Is Newton's Law of Gravitation still applicable today?

Yes, Newton's Law of Gravitation is still widely used today and is considered to be a fundamental principle of physics. However, it has been further developed and refined by other scientists, such as Albert Einstein's theory of general relativity.

What are some real-life examples of Newton's Law of Gravitation?

Some examples include the orbit of the planets around the sun, the motion of satellites around the Earth, and the attraction of objects towards the Earth's surface due to gravity. It also explains why objects fall to the ground when dropped and why the tides in the ocean occur.

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