Question 1 :
The time period of an earth satellite in circular orbit is independent of:
Question 2 :
While orbiting around the earth in a apaceship, an astronaut experiences
Question 3 :
A particle falls towards earth from infinity. The velocity with which it reaches earths surface is<br/>
Question 4 :
When a satellite falls to an orbit of smaller radius its kinetic energy :
Question 5 :
If both the mass and radius of the earth decrease by $1$% the value of<br>
Question 6 :
The escape velocity of a body from the earth is $u$. What is the escape velocity from a planet whose mass and radius are twice those of the earth?<br>
Question 8 :
The orbital angular velocity vector of a geostationary satellite and the spin angular velocity vector of the earth are<br>
Question 9 :
The escape velocity on the surface of a planet is $V_{e}$ what would be the escape velocity on the planet having the same radius but mass 4 times that of it.
Question 11 :
 The escape velocity of projection from the earth is approximately ($R = 6400 km$).
Question 12 :
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 13 :
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 14 :
To have an earth synchronous satellites it should be launched at the proper height moving from
Question 15 :
The minimum velocity of projection to go out from the earth's gravitational pull is called
Question 16 :
A pendulum clock which keeps correct time at the surface of the earth is taken into a mine, then<br>
Question 17 :
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 18 :
A missile is launched with a velocity less than the escape velocity.The sum of its kinetic and potential energy is :
Question 19 :
If the radius of earth were to shrink by one percent, its mass remaining the same, the acceleration due to gravity on the earth's surface would<br>
Question 20 :
A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energies is<br>
Question 21 :
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 22 :
Acceleration due to gravity ---------- with height from the surface of the earth.
Question 24 :
The escape velocity of a body projected vertically upwards from the surface of the earth is 'v' if the body is projected at an angle of $30^o$ with the horizontal, the escape velocity would be
Question 26 :
A man weighs $75 kg$ on the surface of the earth. His weight in a geostationary satellite is:<br/>
Question 27 :
Which of the following is the cause of weightlessness experienced while orbiting around earth on a spaceship ?
Question 28 :
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 29 :
Earth is flattened at poles and bulging at equator. This is due to<br>
Question 30 :
Escape velocity of a particle depends on its mass m as
Question 31 :
The escape velocity from the earth for a rocket is 11.2 km/sec. Ignoring the air resistance, the escape velocity of 10 mg grain of sand from the earth will be<br>
Question 32 :
The escape velocity of a sphere of mass $m$ is given by<br>
Question 33 :
The time period of revolution of satellites is T. The kinetic energy of the satellite is proportional to
Question 34 :
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 35 :
The period of a satellite in a circular orbit around a planet is independent of :
Question 36 :
A man covers $60m$ distance in one minute on the surface of earth. The distance he will cover on the surface of moon in one minute is $\left ( g_{m}= \dfrac{g_{e}}{6} \right )$<br/>
Question 37 :
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 38 :
The escape velocity on a planet is $v$. If the radius of the planet contracts to ${\dfrac{1}{4}}^{th}$ of present value without any change in its mass, the escape velocity will be<br>
Question 41 :
When an object is far from earth, 'g' is calculated by the formula:
Question 42 :
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 43 :
If the gravitational force of earth suddenly disappears, then which of the following is correct?<br>
Question 45 :
As a body moves from the equator to the poles, the value of g experienced by the body
Question 46 :
When the velocity of a satellite increases, its kinetic energy increases. The satellite nowt revolves in an orbit of
Question 49 :
An artificial satellite moving in a circular orbit around the earth has a total $(kinetic + potential)$ energy $E_{0}$, its potential energy is:
Question 50 :
If the earth stops rotating, the apparent value of $g$ on its surface will<br>
