Newton's law of gravity

In summary, this conversation discusses the planet Pluto and its characteristics, including its mass and radius. It also mentions its orbit around the sun and the mass of the sun. The question at hand is how high a generic man could jump on Pluto compared to Earth, assuming the same initial velocity. The relevance of the given information for answering this question is not specified.
  • #1
lawfulgm
2
0

Homework Statement


Pluto is only planet that has not yet been visited by a spacecraft . Pluto has a mass of 1.27*10^22 kg and a radius of 1.14*10^6m. although Pluto is in an elliptical orbit about the sun, for simpicity we'll assume Pluto orbits the sun in a circular orbit of radius 5.91*10^12 m. the mass of the sun is 1.99 * 10^30


Homework Equations


The question is...
If generic man can jump to height h on Earth, how high chould generic man jump on Pluto, assuming his initial veocity is the same on both planets?


The Attempt at a Solution

 
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  • #2
How many of those things you are given are relevant to "how high" the man can jump?
 
  • #3
HallsofIvy said:
How many of those things you are given are relevant to "how high" the man can jump?

The question did not mention about that. It just said the man can jump "h" meter.
 
  • #4
You're given a hell of a lot more information than needed in here. How can you figure out the acceleration of gravity on Pluto using the information provided?
 

What is Newton's law of gravity?

Newton's law of gravity, also known as the law of universal gravitation, states that every object in the universe is attracted to every other object by a force called gravity. This force is directly proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them.

What is the significance of Newton's law of gravity?

Newton's law of gravity is significant because it explains the force of gravity, which is responsible for many phenomena in the universe such as the orbit of planets around the sun, the tides in the ocean, and the trajectory of objects thrown into the air. It also forms the basis of classical mechanics and is a fundamental principle in understanding the motion of objects.

How did Newton discover this law?

Isaac Newton discovered this law in the late 17th century through his famous thought experiment of an apple falling from a tree, which led him to formulate the law of universal gravitation. He also used mathematical equations and observations of planetary motion to support his theory.

Is Newton's law of gravity still valid today?

Yes, Newton's law of gravity is still considered valid today as it accurately predicts the motion of objects on a human scale. However, it was later modified by Albert Einstein's theory of general relativity, which explains gravity on a larger scale such as the motion of galaxies and the bending of light.

How does Newton's law of gravity relate to other laws of motion?

Newton's law of gravity is one of the three laws of motion formulated by Isaac Newton. It specifically relates to the first law of motion, 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. The law of gravity explains the force that acts upon objects to cause them to move or change direction.

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