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Four similar particles of mass m are orbiting in a circle of radius r in the same angular direction because of their mutual gravitational attractive force. Velocity of a particle is given by
03
Oct
Four similar particles of mass m are orbiting in a circle of radius r in the same angular direction because of their mutual gravitational attractive force. Velocity of a particle is given by Four similar particles of mass m are orbiting in a circle of radius r in the same angular direction because of their [...]
The change in the value of g at a height h above the surface of earth is the same as at a depth d below the earth. When both d and h are much smaller than the radius of earth, then which one of the following is correct?
03
Oct
The change in the value of g at a height h above the surface of earth is the same as at a depth d below the earth. When both d and h are much smaller than the radius of earth, then which one of the following is correct? The change in the value of g [...]
Suppose the gravitational force varies inversely as the nth power of distance, then the time period of a planet in circular orbit of radius R around the sun will be proportional to.
03
Oct
Suppose the gravitational force varies inversely as the nth power of distance, then the time period of a planet in circular orbit of radius R around the sun will be proportional to. Suppose the gravitational force varies inversely as the nth power of distance then the time period of a planet in circular orbit of [...]
The escape velocity corresponding to a planet of mass M and radius R is 50 km/s . If the planet’s mass and radius were 4 M and R, respectively, then the corresponding escape velocity would be.
03
Oct
The escape velocity corresponding to a planet of mass M and radius R is 50 km/s . If the planet’s mass and radius were 4 M and R, respectively, then the corresponding escape velocity would be. respectively The escape velocity corresponding to a planet of mass M and radius R is 50 km/s . If [...]
A body starts from a point distant r0 from the centre of the earth. It reaches the surface of the earth whose radius is R. The velocity accquired by the body is
03
Oct
A body starts from a point distant r0 from the centre of the earth. It reaches the surface of the earth whose radius is R. The velocity accquired by the body is A body starts from a point distant r0 from the centre of the earth. It reaches the surface of the earth whose radius [...]
Consider two solid uniform spherical objects of the same density ρ. One has radius R and the other has radius 2R. They are in outer space where the gravitational fields from other objects are negligible. If they are arranged with their surface touching, what is the contact force between the objects due to their traditional attraction?
03
Oct
Consider two solid uniform spherical objects of the same density ρ. One has radius R and the other has radius 2R. They are in outer space where the gravitational fields from other objects are negligible. If they are arranged with their surface touching, what is the contact force between the objects due to their traditional [...]
A solid sphere of uniform density and radius R applies a gravitational force of attraction equal to F 1 on a particle placed at a distance 2R from the centre of the sphere. A spherical cavity of radius R/2 is now made in the sphere as shown in the figure. The sphere with the cavity now applies a gravitational force F 2 on the same particle. The ratio F 1 /F 2 is
03
Oct
A solid sphere of uniform density and radius R applies a gravitational force of attraction equal to F 1 on a particle placed at a distance 2R from the centre of the sphere. A spherical cavity of radius R/2 is now made in the sphere as shown in the figure. The sphere with the [...]
A body is released from a point of distance R’ from the centre of the earth. Its velocity at the time of striking the earth will be (R ′ >R e ).
03
Oct
A body is released from a point of distance R’ from the centre of the earth. Its velocity at the time of striking the earth will be (R ′ >R e ). A body is released from a point of distance R' from the centre of the earth. Its velocity at the time of striking [...]
A solid sphere of radius R/2 is cut out of a solid sphere of radius R such that the spherical cavity so formed touches the surface on one side and the centre of the sphere on other side, as shown. The initial mass of the solid sphere was M. If a particle of mass m is placed at a distance 2.5R from the centre of the cavity, then what is the gravitational attraction on the mass m?
03
Oct
A solid sphere of radius R/2 is cut out of a solid sphere of radius R such that the spherical cavity so formed touches the surface on one side and the centre of the sphere on other side, as shown. The initial mass of the solid sphere was M. If a particle of mass m [...]
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A solid sphere of radius R/2 is cut out of a solid sphere of radius R such that the spherical cavity so formed touches the surface on one side and the centre of the sphere on other side ,
as shown. The initial mass of the solid sphere was M. If a particle of mass m is placed at a distance 2.5R from the centre of the cavity ,
then what is the gravitational attraction on the mass m? ,
A body is released from a point of distance R’ from the centre of the earth. Its velocity at the time of striking the earth will be (R ′ >R e ).
03
Oct
A body is released from a point of distance R’ from the centre of the earth. Its velocity at the time of striking the earth will be (R ′ >R e ). A body is released from a point of distance R' from the centre of the earth. Its velocity at the time of [...]