Question 1 :
When a satellite falls to an orbit of smaller radius its kinetic energy :
Question 2 :
If the mass of earth were $4$ times the present mass, the mass of the moon were half the present mass and the moon were revolving round the earth at the same present distance, the time period of revolution of the moon would be approximately.<br>
Question 3 :
The time period of an earth satellite in circular orbit is independent of:
Question 4 :
If suddenly the gravitational force of attraction between the earth and a satellite revolving around it becomes zero, what will happen?
Question 5 :
Two satellites A and B move round the earth in the same orbit. The mass of B is twice the mass of A.Which of the following is correct?
Question 6 :
Two satellites of masses $50 kg$ and $100 kg$ revolve around the earth in circular orbit of radii $9R$ and $16 R$ respectively, where R is the radius of the earth. The speeds of the two satellites will be in the ratio<br/>
Question 7 :
The period of a satellite in a circular orbit around a planet is independent of :
Question 8 :
A pendulum beats seconds on the earth. Its time period on a stationary satellite of the earth will be
Question 9 :
Two satellites of masses 400 kg, 500 kg are revolving around earth in different circular orbits of radii $r_{1}$, $r_{2}$ such that their kinetic energies are equal. The ratio of $r_{1}$, $r_{2}$ is<br>
Question 10 :
A satellite is orbiting around the earth. The centripetal acceleration of the satellite is given by:I. Distance from the center of the Earth II. Mass of the Earth <br/>III. Mass of the satellite <br/>
Question 11 :
While orbiting around the earth in a spaceship, an astronaut weight becomes
Question 12 :
A person sitting in a satellite orbiting earth feels weightlessness due to
Question 15 :
An earth's satellite is moving in a circular orbit with a uniform speed v. If the gravitational force of the earth suddenly disappears, the satellite will:-
Question 16 :
The time period of revolution of satellites is T. The kinetic energy of the satellite is proportional to
Question 17 :
When a satellite going round the earth in a circular orbit of radius $r$ and speed $v$ loses some of its energy, then $r$ and $v$ change as<br>
Question 18 :
For a satellite escape velocity is 11 km/s. If the satellite is launched at an angle of $60^{0}$ with the vertical, then escape velocity would be <br>
Question 19 :
The orbital angular velocity vector of a geostationary satellite and the spin angular velocity vector of the earth are<br>
Question 20 :
When the velocity of a satellite increases, its kinetic energy increases. The satellite nowt revolves in an orbit of
Question 21 :
A man weighs $75 kg$ on the surface of the earth. His weight in a geostationary satellite is:<br/>
Question 22 :
A particle falls towards earth from infinity. The velocity with which it reaches earths surface is<br/>
Question 23 :
Assume that a satellite is revolving around Earth in a circular orbit almost close to the surface of Earth. The time period of revolution of satellite is $( $Radius of earth is 6400 km, $g =$ 9.8 $ms^{-2})$<br>
Question 25 :
Time period of a satellite in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be<br>
Question 26 :
 Two satellites $A$ and $B$ move round the earth in the same orbit. The mass of $B$ is twice the mass of $A.$ Which of the following is correct?
Question 27 :
A spaceship is launched into a circular orbit close to earth's surface. The additional velocity that should be imparted to the spaceship in the orbit to overcome the gravitational pull is:<br/>(Radius of earth $=6400km$ and $g=9.8m\quad { s }^{ -1 }$)
Question 28 :
If $g$ is acceleration due to gravity on the earth's surface, the gain in the potential energy of an object of mass $m$ raised from the surface of earth to a height equal to the radius $R$ of the earth is
Question 29 :
The height at which the value of acceleration due to gravity becomes $50$% of that at the surface of the earth. (Radius of the earth $ = 6400$ km) is<br/>
Question 30 :
The mass of earth is $80$  times that of moon. Their diameters are $12800\ Km$  and  $3200\ Km$ respectively. The value of g on moon will be _______, if its value on earth is $980\ cm/s^2$.
