physics
mechanics
Easy
Question
A satellite is seen after each 8 hours over equator at a place on the earth when its sense of rotation is opposite to the earth. The time interval after which it can be seen at the same place when the sense of rotation of earth and satellite is same will be :
- 8 hours
- 12 hours
- 24 hours
- 6 hours
The correct answer is: 24 hours
Related Questions to study
Physics
A satellite is seen after every 6 hours over the equator. It is known that it rotates opposite to that of earth's direction. Then the angular velocity (in radians per hour) of the satellite about the centre of earth will be:
A satellite is seen after every 6 hours over the equator. It is known that it rotates opposite to that of earth's direction. Then the angular velocity (in radians per hour) of the satellite about the centre of earth will be:
PhysicsMechanics
Physics
PhysicsMechanics
Physics
The mean radius of the earth is R, its angular speed on its own axis is 
and the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geo-stationary satellite will be
The mean radius of the earth is R, its angular speed on its own axis is and the acceleration due to gravity at earth's surface is g. The cube of the radius of the orbit of a geo-stationary satellite will be
PhysicsMechanics
Physics
In a satellite if the time of revolution is T, then kinetic energy is proportional to
In a satellite if the time of revolution is T, then kinetic energy is proportional to
PhysicsMechanics
Physics
A particle of mass M is situated at the centre of a spherical shell of same mass and radius R. The gravitational potential at a point situated at 5 distance from the centre will be
A particle of mass M is situated at the centre of a spherical shell of same mass and radius R. The gravitational potential at a point situated at 5 distance from the centre will be
PhysicsMechanics
Physics
The change in potential energy when a body of mass m is raised to a height n RE from earth's surface is (RE. radius of the earth)
The change in potential energy when a body of mass m is raised to a height n RE from earth's surface is (RE. radius of the earth)
PhysicsMechanics
Physics
Four particles each of mass m are placed at the vertices of a square of side l. The potential at the centre of square is
Four particles each of mass m are placed at the vertices of a square of side l. The potential at the centre of square is
PhysicsMechanics
Physics
Four particles each of mass m are placed at the vertices of a square of side . The potential energy of the system is
Four particles each of mass m are placed at the vertices of a square of side . The potential energy of the system is
PhysicsMechanics
Physics
The intensity of gravitational field at a point situated at a distance of 8000 km from the centre of the earth is 6 N / kg. The gravitational potential at that point is - (in Joule/ kg)
The intensity of gravitational field at a point situated at a distance of 8000 km from the centre of the earth is 6 N / kg. The gravitational potential at that point is - (in Joule/ kg)
PhysicsMechanics
Physics
A projectile is launched from the surface of Earth with a velocity less than the escape velocity. Its total mechanical energy is
A projectile is launched from the surface of Earth with a velocity less than the escape velocity. Its total mechanical energy is
PhysicsMechanics
Physics
Particles of masses 2 M, m and 3 M are respectively at points A, B and C with AB=1/4(BC). m is much-much smaller than M and at time t=0, they are all at rest. At subsequent times before any collision takes place
Particles of masses 2 M, m and 3 M are respectively at points A, B and C with AB=1/4(BC). m is much-much smaller than M and at time t=0, they are all at rest. At subsequent times before any collision takes place
PhysicsMechanics
Physics
A body weighs 72N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?
A body weighs 72N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?
PhysicsMechanics
Physics
A body weighs 250 N on the surface of the earth. How much will it weigh half way down to the centre of the earth?
A body weighs 250 N on the surface of the earth. How much will it weigh half way down to the centre of the earth?
PhysicsMechanics
Physics
Mass remaining constant, the radius of the Earth shrinks by 1%. The acceleration due to gravity on the earth's surface would
Mass remaining constant, the radius of the Earth shrinks by 1%. The acceleration due to gravity on the earth's surface would
PhysicsMechanics
Physics
The acceleration of a body due to the attraction of the earth (radius R) at a distance 2 R from the surface of the earth is (g= acceleration due to gravity at the surface of the earth)
The acceleration of a body due to the attraction of the earth (radius R) at a distance 2 R from the surface of the earth is (g= acceleration due to gravity at the surface of the earth)
PhysicsMechanics
