NEET Physics MCQs

What is the binding energy of earth-sun system neglecting the effect of other planets and satellites? (Mass of earth ${M_e} = 6 imes {10^{24}}kg$, mass of the sun ${M_x} = 2 imes {10^{30}}{\rm{k}}{{\rm{g}}^{ - 2}}$)

The change in potential energy when a body of mass $m$ is raised to a height $nR$ from the centre of earth (R= radius of earth)

How much energy will be necessary for making a body of 500 kg escape from the earth [ g = 9.8 ${\rm{m}}{{\rm{s}}^{ - 2}},$ radius of earth = $6.4 imes {10^6}$m]

If mass of earth is $M$, radius is $R$ and gravitational constant is $G$, then work done to take $1\,kg$ mass from earth surface to infinity will be

A body of mass $m$ is moved to a height h equal to the radius of the earth. The increase in potential energy is

The changes in potential energy when a body of mass $m$ is raised to a height $nR$ from earth’s surface is (R= radius of the earth)

The gravitational potential difference between the surface of a planet and a point 20 m above it is $14{\rm{\;Jk}}{{\rm{g}}^{ - 1}}$. The work done in moving a $2.0\,kg$ mass by $8.0\,m$ on a slop of ${60^0}$ from the horizontal is equal to

A point $P\left( {R\sqrt 3 ,0,0} \right)$ lies on the axis of a ring of mass $M$ and radius $R$. The ring is located in $y - z$ plane with its centre at origin $O$. A small particle of mass m starts from P and reaches $O$ under gravitational attraction only. Its speed at $O$ will be

If ${v_e}\,and\,{v_o}$ represent escape velocity and orbital velocity of a satellite corresponding to a circular orbit of radius R, then

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