Chapter 12 – Gravitation
Two identical trains A and B move with speeds on parallel tracks along the equator. A moves from east to west and B moves from west to east. Which train will exert greater force on the track?
14
Sep
Two identical trains A and B move with speeds on parallel tracks along the equator. A moves from east to west and B moves from west to east. Which train will exert greater force on the track? Two identical trains A and B move with speeds on parallel tracks along the equator. A moves from [...]
The escape velocity for a planet is ve. A tunnel is dug along a diameter of the planet and a small body is dropped into it at the surface. When the body reaches the centre of the planet, its speed will be
14
Sep
The escape velocity for a planet is ve. A tunnel is dug along a diameter of the planet and a small body is dropped into it at the surface. When the body reaches the centre of the planet, its speed will be its speed will be The escape velocity for a planet is ve. A [...]
A system of binary stars of masses mA and mB are moving in circular orbits of radii rA and rB, respectively. If TA and TB are the time periods of masses mA and mB, respectively then.
14
Sep
A system of binary stars of masses mA and mB are moving in circular orbits of radii rA and rB, respectively. If TA and TB are the time periods of masses mA and mB, respectively then. A system of binary stars of masses mA and mB are moving in circular orbits of radii rA and [...]
In the previous questions, if the mass of the body is half the mass of the earth, and all other data remain the same, then t is equal to
14
Sep
In the previous questions, if the mass of the body is half the mass of the earth, and all other data remain the same, then t is equal to and all other data remain the same if the mass of the body is half the mass of the earth In the previous questions then t [...]
A small body of superdense material, whose mass is twice the mass of the Earth but whose size is very small compared to the size of the Earth, starts from rest at a height H
14
Sep
A small body of superdense material, whose mass is twice the mass of the Earth but whose size is very small compared to the size of the Earth, starts from rest at a height H A small body of superdense material starts from rest at a height H whose mass is twice the mass of [...]
The escape velocity for a planet is ve. A particle starts from rest at a large distance from the planet, reaches the planet only under gravitational attraction, and passes through a smooth tunnel through its centre. Its speed at the centre of the planet will be –
14
Sep
The escape velocity for a planet is ve. A particle starts from rest at a large distance from the planet, reaches the planet only under gravitational attraction, and passes through a smooth tunnel through its centre. Its speed at the centre of the planet will be – and passes through a smooth tunnel through its [...]
A point P lies on the axis of a fixed ring of mass M and radius a, at a distance a from its centre C.A small particle starts from P and reaches C under gravitational attraction only. Its speed at C will be
14
Sep
A point P lies on the axis of a fixed ring of mass M and radius a, at a distance a from its centre C.A small particle starts from P and reaches C under gravitational attraction only. Its speed at C will be A point P lies on the axis of a fixed ring of [...]
Three point masses, are at the corners of an equilateral triangle of side a. Their separation does not change when the system rotates about the center of the triangle. For this, the time period of rotation must be proportional to.
14
Sep
Three point masses, are at the corners of an equilateral triangle of side a. Their separation does not change when the system rotates about the center of the triangle. For this, the time period of rotation must be proportional to. are at the corners of an equilateral triangle of side a. Their separation does not [...]
A double star is a composite system of two stars rotating about their centre of mass under their mutual gravitational attraction. Let us consider such a double star which has two stars of masses m and 2m and let their separation be L. Their time period of rotation about their centre of mass will be proportional to
14
Sep
A double star is a composite system of two stars rotating about their centre of mass under their mutual gravitational attraction. Let us consider such a double star which has two stars of masses m and 2m and let their separation be L. Their time period of rotation about their centre of mass will be [...]
Two bodies of masses m1 and m2 are initially at rest at infinite distance apart. They are then allowed to move towards each other under mutual gravitational attraction. Their relative velocity of approach at a separation distance r between them is
14
Sep
Two bodies of masses m1 and m2 are initially at rest at infinite distance apart. They are then allowed to move towards each other under mutual gravitational attraction. Their relative velocity of approach at a separation distance r between them is The escape velocity from earth is ves. A body is projected with velocity 2 [...]