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There are a couple of things we need to understand to get this one right. The first is that we need to know what velocity is. We generally know what speed is. It's distance per unit of time, like driving on the freeway at 65 miles per hour. Velocity takes this one step further by coupling a direction vector to speed. For the driving example to become velocity, we need to add direction, and 65 miles per hour west is a velocity. As the earth moves in its orbit, it is constantly changing its direction because of the sun's gravity. We know that the earth would fly off into space if gravity instantly disappeared, so the earth has that motion coupled to the acceleration caused by the sun's gravity. That big blue marble is moving along a curved path, the ellipse we mentioned.
The other thing we need to consider is that the elliptical orbit along which it moves brings the earth closer to the sun at some times, and allows it to be further away at others. Our planet is going to be moving faster as it approaches the sun, and slower as it moves away. The force of gravity is greater close up and is less farther away. Pair up these two motions, and we can understand why the earth's velocity changes as out home planet moves in its orbit.
What else can I help you with?
What season is earths orbital velocity greatest?
Earth's orbital velocity is greatest during the Northern Hemisphere's winter, specifically around early January, when Earth is closest to the Sun in a position called perihelion. This increased speed occurs due to the gravitational pull of the Sun being stronger when the distance is shorter. Conversely, during the summer in the Northern Hemisphere, around early July, Earth is farthest from the Sun (aphelion) and moves more slowly in its orbit.
Assume that the moon travel at constant speed in a circular orbit around the earth is the moon's velocity is constant?
Yes, since the moon is in a circular orbit around the Earth, its velocity is constant but its direction is changing continuously as it moves around the Earth. This constant velocity is necessary to maintain the circular motion without drifting away or falling into the Earth.
The force of gravity is responsible for changing the what in which a satellite moves?
The force of gravity is responsible for changing the velocity of a satellite, thus affecting its path or trajectory in space. This force influences the satellite's speed and direction, causing it to move in an elliptical orbit around a larger body such as a planet or a star.
What happens when the moon moves into earths shadow?
That's when we have a lunar eclipse.
Why the moon stars and sun change positions in the sky?
First of all, the stars don't move. The Earth moves around the Sun. The moon moves around the Earth and the whole SOLAR SYSTEM is moving.
How will the velocity of the book change as it moves across a surface with no friction?
The velocity of the book will remain constant as it moves across a surface with no friction.
Where For an object moving in a circular path which quantity is always changing?
The velocity of the object is constantly changing in direction as it moves around the circle. This change in direction indicates a change in velocity, even if the speed remains constant.
Why does change in velocity happen?
When velocity changes, that means that the object either moves faster, or moves slower, or moves in a different direction. Any of these changes is called "acceleration". A force is necessary to cause it.
When an object moves in a circular path will the velocity change will there be acceleration?
The velocity of an object moving in a circular path will change because the direction of the velocity vector is constantly changing. This change in velocity indicates that there is acceleration present, known as centripetal acceleration, which always points towards the center of the circular path.
What is the rate of change of velocity with distance called?
The rate of change of velocity with distance is called acceleration. It measures how velocity changes over time as an object moves along its path.
When is kinetic energy for a match box car zero?
Kinetic energy = ½ * mass * velocity^2 The mass doesn't change as the match box car moves around, but when it stops velocity =0. When the velocity = 0. KE = 0.
How does weathering shape earths surface?
changes by the moving air. when weathering moves things around apperances start to change. then, we change it to by moving things like rocks and grass and we change the earth.
What kind of force moves an object away?
By definition, any force enacts a change in momentum. Momentum is mass times velocity, so a force is a change in mass and/or velocity. Since mass is usually constant, any force therefore enacts a change in velocity, and thus moves an object away.
What kind force moves an object away?
By definition, any force enacts a change in momentum. Momentum is mass times velocity, so a force is a change in mass and/or velocity. Since mass is usually constant, any force therefore enacts a change in velocity, and thus moves an object away.
What happens when velocity changes?
When velocity changes, the speed and/or direction of an object's motion is altered. This can result in acceleration or deceleration, depending on the direction of the change in velocity. If the velocity increases, the object is accelerating; if the velocity decreases, the object is decelerating.
If object moves with constant acceleration its velocity is?
It velocity is constantly increasing, v=vo + at.
Can a particle with maximum speed have zero acceleration?
Yes. Velocity implies both a magnitude and a direction. An object going around in a circle moves at a constant speed, but the direction, and therefore the velocity, is changing.Yes. Velocity implies both a magnitude and a direction. An object going around in a circle moves at a constant speed, but the direction, and therefore the velocity, is changing.Yes. Velocity implies both a magnitude and a direction. An object going around in a circle moves at a constant speed, but the direction, and therefore the velocity, is changing.Yes. Velocity implies both a magnitude and a direction. An object going around in a circle moves at a constant speed, but the direction, and therefore the velocity, is changing.
