Gravitation Questions

A body of mass ′m′ is taken from the earth′s surface to the height equal to twice the radius (R) of the earth. The change in potential energy of body will be :-...

Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1m, 2m, 4m, 8m, ...., respectively, from the origin. The resulting gravitational potential due to this system at the ori...

Kepler′s third law states that square of period of revolution (T) of a planet around the sun, is proportional to third power of average distance r between sun and planeti.e. T2 = Kr3here K is co...

The acceleration due to gravity at a height 1 km above the earth is the same as at a depth d below the surface of earth. Then :-

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will :-

At what height from the surface of earth the gravitation potential and the value of g are -5.4 × 107 J kg-2 and 6.0 ms-2 respectively? Take the radius of earth as 6400 km:...

The ratio of escape velocity at earth (υe) to the escape velocity at a planet (υp) whose radius and mean density are twice as that of earth is:...

If the mass of the Sun were ten times smaller and the universal gravitational constant were ten time larger in magnitude, which of the following is not correct ?

Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by

The maximum and minimum distance of a comet from the sun are 14 × 109 m and 7× 107m respectively. If the maximum velocity of the comet is 6 × 102 km/sec, its minimum velocity will be:-...

Four particles, each of mass M and equidistant from each other, move along a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is...

A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 × 1024 kg) have to be compressed to be ...

Two bodies, each of mass M, are kept fixed with a separation 2L. A particle of mass m is projectedfrom the midpoint of the line joining their centres, perpendicular to the line. The gravitational cons...

A spherical planet has a mass Mp and diameter Dp. A particle of mass m falling freely near the surfaceof this planet will experience an acceleration due to gravity, equal to...

If the radius of the earth to shrink by one per cent, its mass remaining the same, the acceleration due to gravity on the earth′s surface would

If g is the acceleration due to gravity on the earth′s surface, the gaing in the potential energy of an object mass m raised from the surface of the earth to a height equal to the radius of R of...

Imagine a light planet revolving around a very massivr star in a circular orbit of radius R with a period of revolution T. If the gravitational force of attraction between the planet and the star is p...

If the distance between the earth and the sun is half of its present value, the number of days in year would have been

A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very compared to the mass of the earth

A geostationary satellite orbit s arround the earth in a circular orbit of radius 36000 km. Then, the time period of a spy satellite orbiting a few hundred km above the earth′s surface (Re = 640...