If a planet comes closer to the Sun, then the planet willA. orbit faster.B. orbit slower.C. fall into the Sun.D. keep moving with the same speed
Question
If a planet comes closer to the Sun, then the planet will
A. orbit faster.
B. orbit slower.
C. fall into the Sun.
D. keep moving with the same speed
Solution
To determine what happens to a planet's orbit when it comes closer to the Sun, we need to consider Kepler's laws of planetary motion and the principles of gravitational force.
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Kepler's Second Law (Law of Equal Areas): This law states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time. This implies that a planet moves faster when it is closer to the Sun and slower when it is farther from the Sun.
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Gravitational Force: The gravitational force between two objects is inversely proportional to the square of the distance between them. As a planet comes closer to the Sun, the gravitational pull increases, causing the planet to accelerate.
Given these principles, the correct answer is:
A. orbit faster.
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