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 willA. 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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