The law of universal gravitation and Satellites and astronauts: Putting it all together
The average radius of Earth’s orbit around the Sun is 1.5 X 108 km. The mass of Earth is 5.97 X 1024 kg, and it makes one orbit in approximately 365 days. (a) What is Earth’s speed relative to the Sun? (b) Estimate the Sun’s mass using Newton’s law of universal gravitation and Newton’s second law. What assumptions did you need to make?
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