Question 1 :
The period of a satellite in a circular orbit around a planet is independent of :
Question 2 :
A person sitting in a satellite orbiting earth feels weightlessness due to
Question 3 :
If suddenly the gravitational force of attraction between the earth and a satellite revolving around it becomes zero, what will happen?
Question 4 :
To have an earth synchronous satellites it should be launched at the proper height moving from
Question 8 :
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 9 :
A missile is launched with a velocity less than the escape velocity.The sum of its kinetic and potential energy is :
Question 10 :
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 11 :
While orbiting around the earth in a spaceship, an astronaut weight becomes
Question 12 :
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 14 :
When a satellite falls to an orbit of smaller radius its kinetic energy :
Question 15 :
Assertion: Total energy is conserved in moving a satellite to higher orbit.
Reason: Sum of change in PE and KE is same in magnitude and opposite in nature
Question 16 :
A satellite is in a circular orbit around the earth at an altitude $R$ above the earth's surface, where $R$ is the radius of the earth. If $g$ is the acceleration due to gravity on the surface of the earth, the speed of the satellite is:
Question 17 :
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 18 :
While orbiting around the earth in a apaceship, an astronaut experiences
Question 19 :
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 20 :
A pendulum beats seconds on the earth. Its time period on a stationary satellite of the earth will be
Question 21 :
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 22 :
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 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 24 :
A satellite is orbiting the earth at 17,500 MPH, a rock is released from the satellite. Identify what would happen to the rock.<br/>
Question 25 :
Motion of artificial satellite around the earth is powered by :
Question 26 :
An artificial satellite is revolving in a circular orbit at height of $1200 km$ above the surface of the earth. If the radius of the earth is $6400km$ and mass is $6\times 10^{24}$ kg the orbital velocity $\left ( G= 6.67\times 10^{-11} Nm^{2}/kg^{2} \right)$ is<br/>
Question 27 :
LANDSAT series of satellites move in near polar orbits at an altitude of
Question 28 :
An artificial satellite moving in a circular orbit around the earth has a total $(kinetic + potential)$ energy $E_{0}$, its potential energy is:
Question 29 :
A particle falls towards earth from infinity. The velocity with which it reaches earths surface is<br/>
