Chapter 10 – Gravitation
Two planets A and B have the same material density. If the radius of A is twice that of B, then the ratio of the escape velocity Va/Vb
18
Sep
Two planets A and B have the same material density. If the radius of A is twice that of B, then the ratio of the escape velocity Va/Vb then the ratio of the escape velocity Va/Vb Two planets A and B have the same material density. If the radius of A is twice that of [...]
The ratio of the acceleration due to gravity as the bottom of a deep mine and that on the surface of the earth is 978/980. Find the depth of the mine, if the density of the earth is uniform throughout and the radius of the earth is 6300 km.
18
Sep
The ratio of the acceleration due to gravity as the bottom of a deep mine and that on the surface of the earth is 978/980. Find the depth of the mine, if the density of the earth is uniform throughout and the radius of the earth is 6300 km. if the density of the earth [...]
A planet has same density and same acceleration due to gravity as of earth and universal gravitational constant G is twice of earth. The ratio of their radii is
18
Sep
A planet has same density and same acceleration due to gravity as of earth and universal gravitational constant G is twice of earth. The ratio of their radii is A planet has same density and same acceleration due to gravity as of earth and universal gravitational constant G is twice of earth. The ratio of [...]
The mass of the moon is 81/1 of the earth but the gravitational pull is 6/1 of the earth. It is due to the fact that
18
Sep
The mass of the moon is 81/1 of the earth but the gravitational pull is 6/1 of the earth. It is due to the fact that The mass of the moon is 81/1 of the earth but the gravitational pull is 6/1 of the earth. It is due to the fact that September 18, 2020 [...]
The height of a point vertically above the earth’s surface at which the acceleration due to gravity becomes 1% of its value at the surface is (Given, R= radius of earth)
18
Sep
The height of a point vertically above the earth’s surface at which the acceleration due to gravity becomes 1% of its value at the surface is (Given, R= radius of earth) R= radius of earth) The height of a point vertically above the earth's surface at which the acceleration due to gravity becomes 1% of [...]
Assertion : On earth’s satellite, we feel weightlessness. Moon is also satellite of earth. But on the surface on moon, we do not feel weightlessness Reason : Gravitational force by earth on us on the surface of moon is zero. But gravitational force by moon on us on its surface is non-zero.
18
Sep
Assertion : On earth’s satellite, we feel weightlessness. Moon is also satellite of earth. But on the surface on moon, we do not feel weightlessness Reason : Gravitational force by earth on us on the surface of moon is zero. But gravitational force by moon on us on its surface is non-zero. Assertion : On [...]
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Assertion : On earth's satellite ,
we do not feel weightlessness Reason : Gravitational force by earth on us on the surface of moon is zero. But gravitational force by moon on us on its surface is non-zero. ,
we feel weightlessness. Moon is also satellite of earth. But on the surface on moon ,
Assertion : Let W1 be the work done in taking away a satellite from the surface of earth to its orbit and then W2 the work done in rotating the satellite in circular orbit there. Then, W1=W2 Reason : W2=GMm/2R
18
Sep
Assertion : Let W1 be the work done in taking away a satellite from the surface of earth to its orbit and then W2 the work done in rotating the satellite in circular orbit there. Then, W1=W2 Reason : W2=GMm/2R Assertion : Let W1 be the work done in taking away a satellite from the [...]
Assertion : Areal velocity of a planet around sun will becomes two times if mass of planet is halved Reason : Areal velocity =L/2m, Where L is angular momentum of planet about centre of sun.
18
Sep
Assertion : Areal velocity of a planet around sun will becomes two times if mass of planet is halved Reason : Areal velocity =L/2m, Where L is angular momentum of planet about centre of sun. Assertion : Areal velocity of a planet around sun will becomes two times if mass of planet is halved Reason [...]
Assertion : Two spherical shells have masses m1andm2. Their radii are r1andr2. Let r be the distance of a point from centre. Then gravitational field strength and gravitational potential both are equal to zero for O
18
Sep
Assertion : Two spherical shells have masses m1andm2. Their radii are r1andr2. Let r be the distance of a point from centre. Then gravitational field strength and gravitational potential both are equal to zero for O Assertion : Angular momentum of a planet is constant about any point Reason : For acting on the planet [...]
Assertion : Mass of the rod AB is m1 and of particle P is m2. Distance between centre of rod and particle is r. Then the gravitational force between the rod and the particle is F=Gm1m2/r^2 Reason : The relation F=Gm1m2/r^2 can be applied directly only to find force between two particles.
18
Sep
Assertion : Mass of the rod AB is m1 and of particle P is m2. Distance between centre of rod and particle is r. Then the gravitational force between the rod and the particle is F=Gm1m2/r^2 Reason : The relation F=Gm1m2/r^2 can be applied directly only to find force between two particles. Assertion : Angular [...]