Gravitation Tes...

What does not change in the field of central force

A thin uniform annular disc (See figure) of mass M has outer radius 4R and inner radius 3R. The work required to take a unit mass from point P on its axis to infinity is..............

Suppose the gravitational force varies inversely as the n^th power of distance the time period of planet in circular orbit of radius R around the sun will be proportional to

If the radius of the earth were to shrink by 1% its mass remaning the same, the acceleration due to gravity on the earth’s surface would

A body of mass m is taken from earth surface to the height h equal to radius of earth, the increase in potential energy will be

An artificial satellite moving in a circular orbit around earth has a total (kinetic + potential energy) E_o, its potential energy is

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 agravitational attraction Their relative velocity of apporach at sepration distance r between them is

A geostationary satellite orbits around the earth in a circular orbit of radius 3600 km the time period of a satellite orbiting a few hundred kilometres above the earth’s surface (earth = 6400 km) will approximately be = ...... h

The depth of at which the value of acceleration due to gravity becomes 1/n the time the value of at the surface is (R = radius of earth)

An object weights 72 N on the earth. Its weight at a height R/2 from earth is = .............. N