AST101H1 Lecture Notes - Semi-Major And Semi-Minor Axes

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viridianwoodchuck469

7 Oct 2012

School

UTSG

Department

Astronomy & Astrophysics

Course

AST101H1

Professor

Michael Reid

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AST101H1 Full Course Notes

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Newton"s law of gravity: the force of gravity between masses m and m is equal to the product of their masses, times the gravitational constant g, divided by the square of the distance between them. Mass: the total number of atoms something has. Because the moon is moving perpendicular to the force of gravity. An object moving under the influence of gravity alone is free fall. Escape speed is the speed at which something has to be thrown to escape earth"s gravity. Tycho brahe charted the position of all the planets. Kepler, was his student and used tycho"s data to determine the laws of planetary motion. Keplers first law: all planets orbit the sun in an elliptical shape. An ellipse is a circle with a stretched diameter. Every planet orbits 1 point (sun). (the sun at one focus", which is not in the center)

Related Questions

The gravitational force F between two bodies of masses m₁ and m₂

where G is the gravitational constant (6.672 × 10⁻¹¹ N m² / kg²), m₁ and m₂ are the masses of the bodies in kilograms, and r is the distance between the two bodies. Write a function to calculate the gravitational force between two bodies given their masses and the distance between them. Test your function by determining the force on an 800 kg satellite in orbit 38,000 km above the Earth. (The mass of the Earth is 6.98 × 10²⁴ kg and the radius of the Earth is 6.371 × 10⁶ m.)

where G is the gravitational constant (6.672 × 10⁻¹¹ N m² / kg²), m₁ and m₂ are the masses of the bodies in kilograms, and r is the distance between the two bodies. Write a function to calculate the gravitational force between two bodies given their masses and the distance between them. Test you function by determining the force on an 800 kg satellite in orbit 38,000 km above the Earth. (The mass of the Earth is 6.98 × 10²⁴ kg and the radius of the Earth is 6.371 × 10⁶ m.)

violeteel500

4) According to the ancient Greeks, the Earth was the center ofthe universe and the sun, moon, stars, and planets all went aroundthe Earth. In the 1543 Copernicus proposed the heliocentric theoryof the universe in which the Earth was just another planet orbitingthe Sun and only the moon orbited the Earth.

a) What is the speed at which the Moon goes around the Earth?
b) How does the Moon's orbital acceleration compare to theacceleration of objects near the surface of the Earth?
c) What is the magnitude of the force that the Earth's gravityexerts on the Moon to keep it in orbit?
d) According to Newton's third law, all forces occur in pairs. Whatis the reaction to the Earth's gravity on the moon? Explain.

AST101H1 Lecture Notes - Semi-Major And Semi-Minor Axes

AST101H1 Full Course Notes

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