Engineering Board Exam Reviewer · Physics · easy

Kepler's first law states that planets move in:

1. Circular orbits with the sun at the center
2. Parabolic paths
3. Elliptical orbits with the sun at one focus
4. Straight lines

Answer

C. Elliptical orbits with the sun at one focus

Solution

Kepler's 2nd law: equal areas in equal times. 3rd law: T2 a3.

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