science
Grade8
Easy
Question
What provides the necessary centripetal force to the Earth so that it keeps revolving around the sun in the same orbit?
- Gravitational force
- Muscular force
- Frictional force
- Tension
Hint:
Sun applies a force on earth by virtue of its mass.
The correct answer is: Gravitational force
Here the correct option is 'a' i.e; gravitational force.As we know that two object having mass and placed at a certain distance applies force on one another and that is known as gravitational force. So because of this force the earth revolves around the sun in a fixed orbit forming a circular motion. That's why the net centripetal force is caused by the gravitational force.
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