PDE Q34
0. The planets are kept is motion in their respective orbits by the:
- Option : B
- Explanation : The motion of planets in their respective orbits is maintained by the balance between gravitational force (pulling them toward the Sun) and centrifugal force (resulting from their motion trying to fling them outward). This balance keeps them in stable elliptical orbits around the Sun.
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Option A: Rotation of the sun on its axis
Incorrect. The Sun's rotation does not influence the orbital paths of planets directly. -
Option B: Gravitation and centrifugal forces
Correct. Gravity pulls the planets toward the Sun, while their motion generates a centrifugal force, creating a stable orbit. -
Option C: Great size and spherical shape
Incorrect. These features affect internal structure and gravity but not orbital motion. -
Option D: Rotation and the density of the planets
Incorrect. Rotation and density impact planetary characteristics, not their orbital paths.
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