# Question: At What Part Of An Elliptical Orbit Does A Satellite Have The Greatest Speed?

## Why does a satellite in elliptical orbit gain speed?

The gravitational force changes the speed of a satellite in elliptical orbit because there is a component of the force in the direction of the satellite’s motion.

The gravitational force does do work on a satellite in elliptical orbit because there is a component of the force in the direction the satellite moves..

## When Dr Hewitt releases the two projectiles which one hits the ground first?

When Dr. Hewitt releases the two projectiles, which one hits the ground first? Both balls hit the ground at the same time.

## Is the velocity of satellite constant in elliptical orbit?

That is, the velocity is not constant in an elliptical orbit. The velocity is greatest at perigee and it is slowest at apogee. A circular orbit is a special case where the magnitude of the velocity is constant throughout the orbit.

## What causes an elliptical orbit?

An ellipse is a stretched-out circle. The elliptical orbits produced by gravity around the Sun have a special feature. The Sun is at one ‘focus’ of the ellipse. The two foci of ellipses are two points which have this property: the sum of the distances to these two points are the same for all the points on the ellipse.

## Will satellites eventually fall?

Satellites don’t fall from the sky because they are orbiting Earth. Even when satellites are thousands of miles away, Earth’s gravity still tugs on them. Gravity–combined with the satellite’s momentum from its launch into space–cause the satellite go into orbit above Earth, instead of falling back down to the ground.

## Where does a satellite in an elliptical orbit?

In an elliptical orbit, the satellite’s velocity changes depending on where it is in its orbital path. When the satellite is in the part of its orbit closest to the Earth, it moves faster because the Earth’s gravitational pull is stronger. The satellite is moving the fastest at the low point of an elliptical orbit.

## Why is Earth’s orbit elliptical and not circular?

The first reason has to do with the fact that the Earth’s orbit is not a perfect circle, but is elliptical with the Sun being nearer one end of the ellipse. … The second reason for the yearly variation has to do with the fact that the Earth’s equator is inclined to the plane of the Earth’s orbit around the Sun.

## What will be the total energy of an artificial satellite?

The total energy of a satellite is just the sum of its gravitational potential and kinetic energies. … The centripetal force on a satellite in a circular orbit is provided by gravity.

## Which requires more fuel a rocket going from earth?

A rocket going from the Earth to the Moon would require more fuel. Since the Earth has more mass than the Moon, the Earth will exert a larger gravitational force on the rocket than the Moon would (things weigh less on the Moon).

## Why is it placed only in an orbit in the plane of Earth’s equator think of the satellite’s orbit as a ring around Earth?

Why is it placed only in an orbit in the plane of Earth’s equator? Think of the satellite’s orbit as a ring around Earth. … This can only occur above Earth’s equator. Above any other location, the “ring” of satellite motion and the “ring” of motion of the location on Earth’s surface would not be in the same plane.

## How does the force of gravity between two bodies change when the distance between them is doubled?

Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.

## Why do planets orbit on the elliptical path?

The shape of planetary orbits follows from the observed fact that the force of gravity between two objects depends on the square of the distance between them. … Ellipses are closed so the planets we see in elliptical orbits stick around.

## Why do planets move in elliptical orbit?

All planets move in elliptical orbits, with the sun at one focus. This is one of Kepler’s laws. The elliptical shape of the orbit is a result of the inverse square force of gravity. The eccentricity of the ellipse is greatly exaggerated here.

## Why is kinetic energy a constant for a satellite in a circular orbit but not for a satellite in an elliptical orbit?

Kinetic energy is constant for a satellite in a circular orbit because the distance between the satellite and the center of the attracting body does not change. However, in an elliptical orbit both speed and distance vary.

## How do you find the speed of a satellite in orbit?

The orbital speed can be found using v = SQRT(G*M/R). The R value (radius of orbit) is the earth’s radius plus the height above the earth – in this case, 6.59 x 106 m.

## Which best describes Sid’s error?

Sid created a chart to summarize characteristics of satellite motion. Which best describes Sid’s error? … Centripetal force is perpendicular to the velocity of the satellite. Tangential speed increases with a satellite’s increasing distance from Earth.

## What keeps a satellite up in its orbit?

A satellite maintains its orbit by balancing two factors: its velocity (the speed it takes to travel in a straight line) and the gravitational pull that Earth has on it. A satellite orbiting closer to the Earth requires more velocity to resist the stronger gravitational pull.

## Which is constant for a satellite in orbit?

When in circular motion, a satellite remains the same distance above the surface of the earth; that is, its radius of orbit is fixed. Furthermore, its speed remains constant. … Since kinetic energy is dependent upon the speed of an object, the amount of kinetic energy will be constant throughout the satellite’s motion.

## How long can a satellite stay in orbit?

The satellites in the very low end of that range typically only stay up for a few weeks to a few months. They run into that friction and will basically melt, says McDowell. But at altitudes of 600 km—where the International Space Station orbits—satellites can stay up for decades.

## Do satellites ever collide?

Collisions in space can be disastrous and can send high-speed debris in all directions. This endangers other satellites, future launches, and especially crewed space missions. As a point of reference, NASA often moves the International Space Station when the risk of collision is just 1 in 100,000.

## What is the minimum time period of an earth satellite?

85 minutesSo 85 minutes is approximately the minimum time for a satellite to orbit the Earth.