Physics

#### The masses and radius of earth and moon are M_{1} ,R_{1 }and M_{2} R_{2 }respectively. Their centres are d distance of apart. The minimum velocity with which a particle of mass should be projected from a point mid way between their centres so that it escapes to infinity is……

PhysicsGeneral

#### Answer:The correct answer is:

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#### The mass of the earth is 6.00 Kg and that of the moon is 7.40 kg. The constant of gravitation G=6.667Nm^{-2} kg^{--2}.The potential energy of the system is -7.79 Joules. the mean distance between the earth and moon is =

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#### The acute angle made by the line joining the points and with the -axis is

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#### The Gravitational P.E of a body of mas at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

#### The Gravitational P.E of a body of mas at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

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#### The Gravitational P.E of a body of mas m at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

#### The Gravitational P.E of a body of mas m at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

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#### A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is….

#### A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is….

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#### In a gravitational field, at a point where the gravitational potential is zero

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#### Energy required to move a body of mass m from an orbit of radius 2R to 3R is

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