Q.1.
Which is of the following statement is true Statement A: Gravitational constant G value does not depend on the medium between the bodies Statement B: Gravitational constant G depends on the masses of the bodies and the sizes of the bodies
Q.2.
If the distance between the earth and sun were half its present value, the number of days in a year would be
Q.3.
if both the mass of earth and its radius are decreased by 1%,the value of acceleration of gravity will
Q.4.
A body weigh W newton of the surface of the earth. Its weight at a height equal to half the radius of the earth will be
Q.5.
when a stone of mass m is falling in the earth of mass M, the acceleration of the earth will be
Q.6.
The weight of the object will be  ( More than one correct answer)
Q.7.
Which is of the following statement is true Statement A: it is possible to put an artificial satellite in an orbit such a way that it will remain always directly over New Delhi Statement B: An earth satellite continues to move in the orbit due to centripetal force provided by the burning of the fuel of its engine
Q.8.
A mass m is divided into two part ym and (1-y)m .For a given separation, the value of y for which the gravitational attraction between the two pieces becomes maximum
Q.9.
Two bodies of mass M and 2M are at rest at infinite separation. They move towards each other under the mutual gravitational attraction. Then at separation r ,which of the following is false
Q.10.
The change in the graviational potential energy when a body of mass m is raised to a height nR above the surface of the earth is (here R is the radius of the earth)
Q.11.
Two planets of radii $R_1$ and $R_2$ are made from the same material . The ratio of the accelerations due to gravity $g_1 /g_2$ at the surfaces of the planets is
Q.12.
Assertion: Angular speed of a planet around the sun increases, when it is closer to the sun. Reason: Total angular momentum of the system remains constant. Choose the correct one
Q.13.
Assertion: Total energy is conserved moving a satellite to higher orbit. Reason: Sum of change in PE and KE is same in magnitude and opposite in nature. Choose the correct one
Q.14.
What would be the acceleration due to gravity at another planet, whose mass and radius are twice that of the earth?
Q.15.
The radii of circular orbits of two satellites A and B of the earth, are 4R and R, respectively. If the speed of satellite A is 3V, then the speed of satellite B will be
Q.16.
If we move from equator to pole, the value of acceleration due to gravity
Q.17.
For a satellite moving in an orbit around the earth, the ratio of  potential energy to kinetic energy is
Q.18.
An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) Energy $E_0$. Its potential energy is
Q.19.
The distance of a geostationary satellite from the centre of earth (radius R = 6400 km) is nearest to
Q.20.
Assertion: The earth without its atmosphere would be inhospitably cold. Reason: All heat would escape in the absence of atmosphere. Choose the correct one