A relay satellite transmits the television programme from one part of the world to another part continuously because its period
- is greater than the period of the earth about its axis
- is less than period o f rotation of the earth about its axis
- has no relation with the period of rotation of the earth about its axis
- is equal to the period of rotatiohof the earth about its axis
The Correct Option is D
Solution and Explanation
Top Questions on Gravitation
- Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):
(A) A simple pendulum is taken to a planet of mass and radius, 4 times and 2 times, respectively, than the Earth. The time period of the pendulum remains same on earth and the planet.
(R) The mass of the pendulum remains unchanged at Earth and the other planet.
In light of the above statements, choose the correct answer from the options given below:- JEE Main - 2025
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A small point of mass is placed at a distance from the center of a big uniform solid sphere of mass and radius . The gravitational force on due to is . A spherical part of radius is removed from the big sphere as shown in the figure, and the gravitational force on due to the remaining part of is found to be . The value of the ratio is:
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- Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R): \begin{itemize} \item[(A)] A simple pendulum is taken to a planet of mass and radius, 4 times and 2 times, respectively, than the Earth. The time period of the pendulum remains same on earth and the planet. \item[(R)] The mass of the pendulum remains unchanged at Earth and the other planet. \end{itemize} In light of the above statements, choose the correct answer from the options given below:
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- "The height from Earth's surface at which acceleration due to gravity becomes , where is acceleration due to gravity on the surface of Earth and is the radius of Earth?"
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The height from Earth's surface at which acceleration due to gravity becomes is ? (Where is the acceleration due to gravity on the surface of the Earth and is the radius of the Earth.)
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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].