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प्रश्न
Write scientific reason.
The value of gravitational acceleration (g) decreases as we go above the Earth's surface.
उत्तर
- As the height of an object from the surface of the earth increases, the distance between the object and the centre of the earth (r) increases.
- But, acceleration due to gravity (g) at distance ‘r’ from the centre of earth is given as, g = `"GM"/"r"^2`, therefore acceleration due to gravity (g) decreases with the increase in ‘r’.
- As a result, the value of gravitational acceleration (g) decreases as we go above the earth's surface.
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संबंधित प्रश्न
What is the value of gravitational constant G (i) on the earth, and (ii) on the moon ?
Fill in the following blank with suitable word :
The value of g on the earth is about………………. of that on the moon.
Is the acceleration due to gravity of earth ‘g’ a constant ? Discuss.
Explain why the value of g is zero at the centre of the earth.
The radius of planet A is half the radius of planet B. If the mass of A is MA, what must be the mass of B so that the value of g on B is half that of its value on A?
The value of G varies from place to place.
______ is used to change the speed of the car.
The mass of a body on the surface of the earth is 10 kg. The mass of the same body on the surface on the moon is `"g"_"m" = 1/6 "g"_"e"`, where gm, ge acceleration due to gravity on the surface of the moon and the earth respectively.
The acceleration due to gravity on a planet is 1.96 m/s2. If it is safe to jump from a height of 3 m on tbe earth, the corresponding height on the planet will be ____________.
At a height R above the earth's surface, the gravitational acceleration is ______.
(R = radius of earth, g = acceleration due to gravity on earth's surface.)
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The force of attraction between two unit point masses separated by a unit distance is called
On the earth, a stone is thrown from a height in a direction parallel to the earth’s surface while another stone is simultaneously dropped from the same height. Which stone would reach the ground first and why?
Write if the following statement is correct or wrong.
The value of g is the same everywhere on the surface of the earth.
The moon has a mass of 1/81 that of the earth and a radius of 1/4 that of the earth. The escape speed from the surface of the earth is 11.2 km/s. The escape speed from the surface of the moon is ______.
A mass attached to one end of a string crosses top-most point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be ______. (g = gravitational acceleration)
The acceleration due to gravity on the earth of radius Re is ge, and that on moon of radius Rm, is gm. The ratio of the masses of the earth and moon is given by ______.
If the change in the value of g at the height h above the surface of the earth is the same as at a depth x below it, then ______.
(both x and h being much smaller than the radius of the earth)
