Physics
Grade-10
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:
Satellites also experience the pull by earth.
The correct answer is: All are correct
The correct option is d)All are correct.
Even if satellites are thousands of miles away, Earth's gravity pulls them. Gravity, combined with the satellite's momentum from its launch into space, causes the satellite to swing into orbit above the Earth rather than back to the ground. Orbiting satellites are close enough to be affected by Earth's gravity. This force is constantly pulling the satellite toward the center of the Earth. This is the centripetal force and causes centripetal acceleration. This centripetal force is due the gravity of earth.
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