Advertisements
Advertisements
प्रश्न
Write scientific reason.
The value of acceleration g is greater at the pole than at the equator.
उत्तर
- The shape of the earth is not perfectly spherical. It is slightly flattened at the poles and bulged at the equator.
- As a result, the radius of the earth at the poles is less than that at the equator.
- But, acceleration due to gravity (g) on earth’s surface is given as, g = `"GM"/"R"^2`, therefore acceleration due to gravity increases with the decrease in radius of earth and vice versa.
- Hence, the value of acceleration due to gravity (g) is greater at the pole than at the equator.
संबंधित प्रश्न
Fill in the following blank with suitable word :
The value of g on the earth is about………………. of that on the moon.
Explain why the value of g is zero at the centre of the earth.
An object takes 5 s to reach the ground from a height of 5 m on a planet. What is the value of g on the planet?
The value of G varies from place to place.
Write scientific reason.
The value of gravitational acceleration (g) decreases as we go above the Earth's surface.
The ratio of masses of two planets is 2:3 and the ratio of their radii is 4:7 Find the ratio of their accelerations due to gravity.
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.)
The radius of the orbit of a geostationary satellite is (mean radius of the earth R, angular velocity about an axis in ω and acceleration due to gravity on earth's surface is (g) ______.
In the relation F = `"G M" "m"//"d"^2`, the quantity G
The force of attraction between two unit point masses separated by a unit distance is called
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 lift of mass 'm' is connected to a rope which is moving upward with maximum acceleration 'a'. For maximum safe stress, the elastic limit of the rope is 'T'. The minimum diameter of the rope is ______.
(g = gravitational acceleration)
The value of gravitational acceleration g at a height h above the earth's surface is `"g"/4`, then ______. (R = radius of earth)
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)
