ESS
Grade-9
Easy
Question
The planets move in their respective orbit by_________.
- Inertia and gravitational force
- Inertia and frictional force
- Potential energy and inertia
- None of these
Hint:
Planets orbit the sun in an elliptical orbit due to gravitactional force
The correct answer is: Inertia and gravitational force
- The Sun's gravity pulls the planets towards which provides the centripetal force for circular motion of planets.
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