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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 ?
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 value of g is highest at the equator.
The value of G varies from place to place.
Write scientific reason.
The value of acceleration g is greater at the pole than at the equator.
The mass of the moon is `1/81` of the mass of the earth. Its diameter is `1/3.7` of that of the earth. If acceleration due to gravity on the surface of the earth is 9.8 m/s2, then the acceleration due to gravity on the surface of the moon.
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(R = radius of earth, g = acceleration due to gravity on earth's surface.)
Write if the following statement is correct or wrong.
The value of g is the same everywhere on the surface of the earth.
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The difference in the acceleration due to gravity at the pole and equator is ______.
(g = acceleration due to gravity, R = radius of the earth; θ = latitude, ω = angular velocity, cos0° = 1, cos90° = 0)
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If the surface is smooth, the acceleration of the block m2 will be ______.
A uniform ring of mass M and radius r is placed directly above a uniform sphere of mass 8M and of same radius R. The centre of the ring is at a distance of d = `sqrt3`R from the centre of the sphere. The gravitational attraction between the sphere and the ring is ______.
The mass of a spaceship is 1000 kg. It is to be launched from the earth's surface out into free space. The value of g and R are 10 m/s2 and 6400 km, respectively. The required energy for this work will be ______.
