# Orbit of Artificial Satellites

## Trending Questions

**Q.**

The time period of a satellite in a circular orbit of radius $R$ is $T$. The period of another satellite in a circular orbit of radius $9R$ is

$3T$

$9T$

$27T$

$12T$

**Q.**

A particle on the Earth's surface is given a velocity equal to its escape velocity. Its total mechanical energy remains

**Q.**

A uniform force of $4N$ acts on a body of mass $8kg$ for a distance of $2.0m.$The kinetic energy acquired by the body is

$8J$

$64J$

$4J$

$16J$

**Q.**

The orbital speed of a satellite is inversely proportional to radius of its orbit.

- True
- False

**Q.**

If ve and vo represent the escape velocity and orbital velocity of a satellite corresponding to a circular orbit of radius R, then

**Q.**Choose the correct statement.

- An object's motion can be defined without considering observer.
- In one dimensional motion particle is constrained to move in a plane.
The position of a point x is the expression of its accurate location from a pre-chosen reference point called origin.

- In one dimensional motion particle is constrained to move in a straight line and can't change its direction of motion.

**Q.**

If an object has zero momentum.........wh wh will be it's kinetic energy.........(can the velocity also never be 0)??????

**Q.**

The weight of an object is a constant quantity.

- True
- False

**Q.**

Find vevo where

ve: Escape velocity of satellite at the surface of earth.

vo: Orbital velocity of satellite orbiting at the surface of earth.

**Q.**

The escape velocity at the surface of earth can be expressed as:

ve=√2GMR.

True

False

**Q.**

It is necessary that the plane of the orbit of a satellite must contain the center of the Earth.

- True
- False

**Q.**

How many laws of conservation are there universally?

**Q.**The minimum and maximum distances of a satellite from the centre of the Earth are 2R and 4R respectively, where R is the radius of Earth and M is the Earth.Find radius of curvature at the point of the minimum distance.

**Q.**The minimum distance of a satellite from the centre of the earth is 3R, where R is the radius of 2GM What is the earth. The mass of earth is M. The maximum speed of the satellite is √2GM3R radius of curvature at the point of minimum distance?

- 6 R
- 4 R
- 3 R
- 9R2

**Q.**

Can a body have mass but no weight? Give reasons to your answer.

**Q.**An artificial satellite is moving in a circular orbit around the earth with a speed equal to half the magnitude of escape velocity from the surface of earth. (Radius of earth =6400km). Determine the height of the satellite above the earth's surface.

**Q.**Q A body of mass 60 kg has the momentum 3000 kg m/s. Calculate the kinetic energy of the body.

**Q.**

A thin girl & a fat man have same momentum. Which of the 2 have a greater KE? If the ratio of their masses is 2:5, calculate the ratio of the KE of the man to that of the girl?

Girl has greater KE and ratio of KE’s is 5:2

Girl has greater KE and ratio of KE’s is 2:5

Boy has greater KE and ratio of KE’s is 2:5

Boy has greater KE and ratio of KE’s is 5:2

Boy has greater KE and ratio of KE’s is 25:4

**Q.**What are the conditions under which a rocket, fired from the earth, launches an artificial satellite of the earth?

**Q.**Calculate the escape velocity of a body from the surface of the earth.

[Given:G=6.67×10−11 Nm2/kg2, R=6400 km, g=9.8 m.s2]

**Q.**

A meteorite of mass 5 kg has a velocity of 2 m/s. A lighter meteorite of mass 2 kg has the same momentum. Calculate the i) KE of the heavier meteorite and (ii) the lighter meteorite respectively are:

10 joule , 25 joule

15 joule, 21 joule

18 joule, 29 joule

13 joule, 27 joule

**Q.**A rocket is launched vertical from the surface of the earth o radius R with an initial speed v. If atmospheric resistance is neglected , the maximum height attained by the rocket is

- h=R(2gRv2−1)
- h=R(2gRv2+1)
- h=R2(2gRv2−1)
- h=R2(2gRv2+1)

**Q.**If due to any reason, the orbital speed of a satellite increases 41.4%. Then in this situation would the satellite escape? Explain.

**Q.**

A satellite orbiting about Earth does not fall down because of ___________.

provides the necessary accelaration for its motion along the circular path

Is balanced by the gravitational pull of moon

Is balanced by the gravitational pull os sun

Makes it weightless

**Q.**A geostationary satellite is revolving around the earth. To make it escape from gravitational field of the earth, its velocity must be increased by

- 21.3%
- 41.4%
- 75.3%
- 100%

**Q.**What should be the firing angle for a body to escape from the earth?

- 90∘
- 0∘
- Any angle
- 45∘

**Q.**ENERGY OF AN ORBITING SATELLITE

In motion of an object under the gravitational influence of another object. Which of the following quantities is not conserved?

- Total mechanical energy
- Angular momentum
- mass of an object
- Linear momentum

**Q.**

A particle on the Earth's surface is given a velocity equal to its escape velocity. Its total mechanical energy remains

**Q.**

Two earth-satellites are revolving in the same circular orbit around the center of Earth. They must have the same

Velocity

energy

mass

velocity

**Q.**Which has longer period of revolution, a satellite revolving close or away from the surface of earth?