Question:
Which of the following is the evidence to show that there must be a force acting on earth and directed towards Sun?
Which of the following is the evidence to show that there must be a force acting on earth and directed towards Sun?
Updated On: Jun 21, 2022
- Apparent motion of sun around the earth
- Phenomenon of day and night
- Revolution of earth round the Sun
- Deviation ofthe falling body towards earth
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The Correct Option is C
Solution and Explanation
The earth revolves around the sun due to gravitation pull of the sun. Due to this gravitational attraction between this celestial body, centripetal force is generated which binds the solar system together. Hence revolution of earth round the sun is the evidence to show that there ust be force acting on earth nd directed towards the sun.
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Concepts Used:
Gravitation
In mechanics, the universal force of attraction acting between all matter is known as Gravity, also called gravitation, . It is the weakest known force in nature.
Newton’s Law of Gravitation
According to Newton’s law of gravitation, “Every particle in the universe attracts every other particle with a force whose magnitude is,
- F ∝ (M1M2) . . . . (1)
- (F ∝ 1/r2) . . . . (2)
On combining equations (1) and (2) we get,
F ∝ M1M2/r2
F = G × [M1M2]/r2 . . . . (7)
Or, f(r) = GM1M2/r2
The dimension formula of G is [M-1L3T-2].