science
Grade8
Easy
Question
Why do satellites not fall back to the Earth from their respective orbits?
(a) They are under the constant influence of gravitational force due to the Earth.
(b) They are under the constant influence of centripetal force.
(c)The centripetal force is supplied by the gravitational force
- Only (a) and (b) are correct
- Only (b) and (c) are correct
- Only (c)and (a) are correct
- All are correct
Hint:
Earth attracts the satellites due to a special force.
The correct answer is: Only (c)and (a) are correct
Here the correct option will be 'C' i.e; both c and a. It is because the satellites move around the earth due to the gravitational force of the earth and this gravitational force provides the required centripetal force. We know that for an object to move in circular motion requires a centripetal force.
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