Table of Contents

- 1 What percentage increase in orbit velocity of satellite orbiting near about earth surface so that it escapes from its orbit?
- 2 What percentage increase in orbital velocity of a satellite orbiting near about?
- 3 What determines orbital speed?
- 4 What is the velocity of moon?
- 5 How long does it take for a satellite to orbit?

## What percentage increase in orbit velocity of satellite orbiting near about earth surface so that it escapes from its orbit?

This means that it has to increases 0.414 in 1 or 41.4\%. ∴ The minimum increment is required, as the velocity of satellite is maximum when it is near the earth.

**How does the orbital speed of a satellite change on increasing its orbital radius?**

r = radius of the satellite above the centre of gravity of the large M (in meters). As you can see from the equation, the larger the r value is, the lower the orbital velocity becomes. Higher orbits mean slower speeds, and vice versa.

**What factors affect the orbital speed of a satellite?**

As seen in the equation v = SQRT(G * Mcentral / R), the mass of the central body (earth) and the radius of the orbit affect orbital speed. The orbital radius is in turn dependent upon the height of the satellite above the earth.

### What percentage increase in orbital velocity of a satellite orbiting near about?

When a satellite is moving around the earth with velocity v, then to make the satellite escape, the minimum percentage increase in its velocity should be. So, percentage increase in velocity =0.414√gr√gr×100=414\%.

**What is the percentage increase in velocity for Moon to escape from the gravitational pull of the earth?**

Percentage increase of velocity required to reach terminal velocity. Hence, it is proved that moon would depart forever if its speed were raised by 42\%.

**What is orbital speed of satellite?**

Orbital speed is the speed needed to achieve the balance between gravity’s pull on the satellite and the inertia of the satellite’s motion. This is approximately 27,359 km per hour at an altitude of 242 km. Without gravity, the inertia of the satellite will carry it off into space.

#### What determines orbital speed?

The speed of an object’s orbit around earth depends on the object’s axis – find out how here. Objects captured by the Earth’s gravitation typically have elliptical orbits. The mean orbital speed of the object depends only on the Earth’s mass and the semi-major axis (half the longest diameter) of the object’s orbit.

**What determines the speed of satellite?**

The orbital velocity of the satellite depends on its altitude above Earth. The nearer to Earth, the faster the required orbital velocity. At an altitude of 124 miles (200 kilometers), the required orbital velocity is a little more than 17,000 mph (about 27,400 kph).

**What is the minimum percentage increase in the orbital velocity of the moon so that it departs forever?**

Escape velocity: It is the velocity required by moon to escape or depart forever. Percentage increase of velocity required to reach terminal velocity. Hence, it is proved that moon would depart forever if its speed were raised by 42\%.

## What is the velocity of moon?

Orbital parameters (for orbit about the Earth)

Moon | |
---|---|

Mean orbital velocity (km/s) | 1.022 |

Max. orbital velocity (km/s) | 1.082 |

Min. orbital velocity (km/s) | 0.970 |

Inclination to ecliptic (deg) | 5.145 |

**What is the period of satellite orbiting Earth?**

The period of the orbit must be 24 hours. But in addition, the satellite must be located in an equatorial orbit and orbiting in the same direction as Earth’s rotation. All three criteria must be met for the satellite to remain in one position relative to Earth’s surface.

**How does gravity affect the speed of a satellite in orbit?**

Thus at the correct orbital speed, gravity exactly balances the satellite’s inertia. The orbital speed of the satellite depends on its altitude above the Earth. To maintain an orbit that is 35,786 km above the Earth, a satellite must orbit at the speed of about 11,300 km per hour.

### How long does it take for a satellite to orbit?

To maintain an orbit that is 35,786 km above the Earth, a satellite must orbit at the speed of about 11,300 km per hour. That orbital speed and distance permit the satellite to make one revolution in exactly 24 hours. Because the satellite stays right over the same spot always all the time.

**What is the orbital distance of the Earth from the Sun?**

Earth’s orbital distance from the Sun varies a mere 2\%. The exception is the eccentric orbit of Mercury, whose orbital distance varies nearly 40\%. Determining the orbital speed and orbital period of a satellite is much easier for circular orbits, so we make that assumption in the derivation that follows.

**What is the orbital speed of a planet?**

The orbital speed of the body which is generally a planet or a natural satellite is the speed at which it orbits around the center of the system. This system is usually around a massive body. The orbital speed of the earth around the sun is 108,000 km per hour.