When A Satellite Travels At Constant Speed Its Shape Is ?
A satellite in orbit around Earth traces an oval-shaped path called an ellipse. An ellipse is the closed path taken by a point that moves in such a way that the sum of its distances from two fixed points is constant.
When a satellite travels at a varying speed the shape of its path is?
Satellite speed varies in an elliptical orbit. When the initial speed is more than 8 km/s the satellite overshoots a circular path and moves away from Earth. It loses speed due to the pull of gravity. The satellite slows to a point where it no longer recedes and begins falling back toward Earth.
Is satellite a projectile?
Once launched into orbit the only force governing the motion of a satellite is the force of gravity. Newton was the first to theorize that a projectile launched with sufficient speed would actually orbit the earth.
What happens to an object close to Earth’s surface if it is given a speed exceeding 11.2 km s?
What happens to an object close to Earth’s surface if it is given a speed exceeding 11.2 km/s? With such speed called escape speed the object continues to move away from Earth indefinitely.
Why will a projectile that moves horizontally at 8km s follow a curve that matches the curvature of the earth?
A projectile that moves horizontally at 8km/s will follow a curve that matches the curvature of the Earth because the projectile has 29 000 kilograms per hour and 18 000 miles per hour. … So that it stays in Earth’s gravity so it does not float into space.
When in stable orbit a satellite travels at a constant speed but its velocity is constantly changing Why is this?
An object moving in a circular orbit at a constant speed has a changing velocity. This is because velocity is a vector quantity that depends on speed and direction. The object in orbit is accelerating even though its speed remains constant because its velocity is changing.
Do satellites have a constant velocity?
A geostationary satellite orbits the earth with a velocity of 3.07km/s. So the satellite orbits the earth with a constant speed of 3.07km/s because the magnitude of its speed is constant. … This acceleration is a result of earth’s gravitational force on the satellite.
What happens when a satellite speeds up?
If the satellite is moving too quickly then the gravitational attraction between the Earth and the satellite is too weak to keep it in orbit. If this is the case the satellite will move off into space. This occurs at speeds around or above 11 200 metres per second (m/s).
How do satellites maintain speed?
Satellites are able to orbit around the planet because they are locked into speeds that are fast enough to defeat the downward pull of gravity. … 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.
Do satellites accelerate?
satellite is a projectile. Second a satellite is acted upon by the force of gravity and this force does accelerate it towards the Earth. … Indeed a satellite is accelerating towards the Earth due to the force of gravity.
Why does the force of gravity change the speed of a satellite in an elliptical orbit?
Why does the force of gravity change the speed of a satellite in an elliptical orbit? Gravity slows the satellite as it moves away and speeds it up on its return.
What is the curved path that a satellite follows?
What connection does Earth’s curvature have with the speed needed for a projectile to orbit Earth?
How does Earth’s curvature relate to the speed needed for a projectile to orbit around Earth? An object falls about 5 m in the 1st second on free fall the Earth curves downward 5 meters every 8000 meters so if the object is traveling 8000 m/s or 8 km/s it will never hit the earth.
What is the shape of the 8 km S curve?
Why is it important that satellites are launched to altitude of 150 kilometers or higher?
why are satellites and other objects launched to altitudes above 150 kilometers? The force of gravity on satellite above 150 kilometers is almost as strong as it is at the surface and this high altitude puts the satellite beyond the reach of Earth’s atmosphere Air resistance almost totally absent but not gravity.
At what part of its trajectory does the baseball projectile have minimum speed?
At what part of its trajectory does the baseball have a minimum speed? A ball’s minimum speed occurs at the top of its trajectory. If it is launched vertically its speed at the top is zero. If launched at an angle the vertical component of velocity is zero at the top leaving only the horizontal component.
How can an object have a constant speed but still accelerate?
An object’s acceleration is the rate its velocity (speed and direction) changes. Therefore an object can accelerate even if its speed is constant – if its direction changes. … Since it travels in a straight line its direction does not change. Light travels at a constant speed so its speed never changes either.
When a satellite moves round the earth the quantity which remains constant is?
When earth moves round the sun then according to Keplers second law the radius vector drawn from the sun to earth sweeps out equal areas in equal time i. e. its areal velocity (or the area swept out by it per unit time) is constant.
Does the speed of a satellite remain constant in a particular orbit?
The speed of the satellite would remain constant only if its orbit is perfect circular. This is because any object undergoes circular motion due to a force known as centripetal force. … This can happen only if the satellite is at a particular altitude with proper orbital velocity given in the correct direction.
What is velocity constant?
How can velocity change and speed remain constant?
While the speed of the object is constant its velocity is changing. Velocity being a vector has a constant magnitude but a changing direction. The direction is always directed tangent to the circle and as the object turns the circle the tangent line is always pointing in a new direction.
Which is constant for a satellite in orbit Mcq?
Explanation: Although the speed of the satellite is constant its direction keeps on changing as the orbit is circular or elliptical. The rate of change of velocity vector is acceleration and hence its direction changes the satellite is under acceleration.
What speed do satellites travel at?
Do satellites travel at different speeds?
A: No satellites that orbit at different altitudes have different speeds. … The GOES system of satellites which tracks weather and other things is in a geosynchronous orbit 36 000 kilometers (22 000 miles) above the earth. These satellites travel at about 11 000 kilometers per hour (7 000 miles per hour).
What happens when the speed of an object in orbit increases?
As you keep increasing the velocity you will then reach the Escape Velocity of the Earth and will break out from its orbit escaping into space.
Why does a satellite in a circular orbit travel at a constant speed?
Why does a satellite in a circular orbit travel at a constant speed? There is no component of force acting along the direction of motion of the satellite. … The gravitational force acting on the satellite is balanced by the centrifugal force acting on the satellite.
How do satellites maintain position?
Because it is accelerated by our planet’s gravity the satellite moves very quickly when it is close to the Earth. As it moves away its speed slows so it spends more time at the top of its orbit farthest from the Earth.
What determines orbital speed?
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 is the acceleration of the satellite in orbit?
A satellite in a circular orbit accelerates toward the object it is orbiting at a rate equal to the acceleration of gravity at its orbital radius. As in a falling elevator objects in orbit are in constant freefall. Objects in free fall have no normal force acting upon them and thus no weight.
How can the force of gravity change the speed of a satellite when it is in an elliptical orbit but not when it is in a circular orbit?
The speed of the satellite doesn’t change because there is no component of gravitational force in the direction of its motion. … When a satellite is in an elliptical orbit the gravitational force will have a component along the direction of motion at all points of the orbit except for the perigee and apogee.
When a satellite is in orbit around the Earth the force of gravity on the satellite?
True weightlessness only occurs in deep space where the gravitational force on an object is zero. A satellite in a stable circular orbit around Earth is continually in free fall. As it orbits it experiences a gravitational force towards the centre of Earth which causes it to change direction and ‘fall’ towards Earth.
What does the work energy theorem say about the speed of a satellite in circular orbit?
What does the work energy theorem say about the speed of a satellite in circular orbit? … In accord with the theorem once moving no work is done on the satellite (because the gravitational force has no component parallel to motion) so no change in energy occurs. Hence the satellite cruises at a constant speed.
What is the oval shape of an orbit?
Is a curved path followed by projectile?
Trajectory: the curved path taken by a projectile. Horizontal distance: the distance a projectile moves while falling also called range.
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