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If the Earth suddenly lost its constant velocity, it would result in drastic changes to our environment causing catastrophic events such as massive earthquakes, tsunamis, and extreme weather patterns. The loss of constant velocity would disrupt ecosystems, potentially leading to widespread destruction and loss of life.
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Why velocity is not constant if satellite travels with constant spped at a fixed elevatiopn?
Speed is a scalar quantity meaning it has only magnitude. Velocity is a vector meaning it has magnitude and direction. Whilst the satellite's speed is constant its direction is constantly changing. If its direction didn't change it would fly off in a straight line. Since its direction is changing, the velocity must be changing. And also since the velocity is changing, the satellite is also accelerating (towards the centre of the earth).
A cyclist goes around a level circular track at constant speed. Is the cyclist's acceleration zero because her speed is constant?
No. The cyclist is moving at a constant speed, but her velocity is changing. Remember that velocity is speed with a direction vector associated with it. As speed is constant, only direction is changing. But a change in direction is a change in velocity (even if speed is constant), and this requires acceleration in that direction to accomplish the change in direction. You're on the right track, but just recall that acceleration is tied to velocity and not just speed. And note that velocity can change all the time without speed changing. Acceleration must cause the change in velocity. Consider that objects in orbit around the earth move at a pretty constant speed, but accelerate toward the earth all the time. Their speed coupled with their acceleration toward earth cause them to move in an arc - which is their orbital path.
Can something have an acceleration while moving at a constant velocity?
No. A object can have acceleration while moving at a constant speed (like the earth in its orbit around the sun). But once you use the word "velocity", you've expanded the decription of its motion to include the direction as well as the speed. The definition of acceleration is a change in either speed or direction, so if there is acceleration, then either the speed or the direction of the velocity (or both) is changing, so the velocity is not constant.
What is true about an objects fall velocity as it approaches the earth's surface?
As an object falls towards the Earth's surface, its velocity increases due to the acceleration caused by gravity. Near the surface, the object will reach a terminal velocity where the force of air resistance equals the force of gravity, causing the object to fall at a constant speed.
What is change in the velocity of a falling object?
Any change in the velocity of anything is known as 'acceleration'. In the case of a falling object near the Earth's surface, the direction of the velocity is constant, and its magnitude increases by 9.8 meters (32.2 feet) per second, every second.
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.
Can your body sense constant velocity and explain?
Your body cannot sense constant velocity. For example, you cannot sense that the earth is turning nor can you sense that the earth is orbiting around the sun. And, if you are in a vehicle that is traveling with a constant velocity, you cannot sense that you are moving unless your eyes sense a change in position.
What would happen to us if the earth did not at constant velocity?
There would be a lot of chaos. Seasons would be off, some places would be colder while others warmer.
What would happen to an object in free fall?
The velocity in the x direction would be constant because gravity only affects the vertical components of objects. The velocity in the y direction would increase due to the constant acceleration due to gravity. The acceleration due to gravity on Earth is always -9.81 m/s^2.
Why velocity is not constant if satellite travels with constant spped at a fixed elevatiopn?
Speed is a scalar quantity meaning it has only magnitude. Velocity is a vector meaning it has magnitude and direction. Whilst the satellite's speed is constant its direction is constantly changing. If its direction didn't change it would fly off in a straight line. Since its direction is changing, the velocity must be changing. And also since the velocity is changing, the satellite is also accelerating (towards the centre of the earth).
A satellite in an elliptical orbit travels at constant what?
If the path is perfectly circular, yes, the speed is constant. This should not be confused with the velocity, because while speed is constant, its direction is not; therefore velocity is always changing.
A cyclist goes around a level circular track at constant speed. Is the cyclist's acceleration zero because her speed is constant?
No. The cyclist is moving at a constant speed, but her velocity is changing. Remember that velocity is speed with a direction vector associated with it. As speed is constant, only direction is changing. But a change in direction is a change in velocity (even if speed is constant), and this requires acceleration in that direction to accomplish the change in direction. You're on the right track, but just recall that acceleration is tied to velocity and not just speed. And note that velocity can change all the time without speed changing. Acceleration must cause the change in velocity. Consider that objects in orbit around the earth move at a pretty constant speed, but accelerate toward the earth all the time. Their speed coupled with their acceleration toward earth cause them to move in an arc - which is their orbital path.
Can something have an acceleration while moving at a constant velocity?
No. A object can have acceleration while moving at a constant speed (like the earth in its orbit around the sun). But once you use the word "velocity", you've expanded the decription of its motion to include the direction as well as the speed. The definition of acceleration is a change in either speed or direction, so if there is acceleration, then either the speed or the direction of the velocity (or both) is changing, so the velocity is not constant.
What maintains the speed of earth as it orbits around the sun?
As we know that Kepler's laws of planetary motion state that aerial velocity of a planet remains constant i.e dA/dt = constant , Where A is the area swept by the planet around sun. so to maintain the aerial velocity constant,planet has variable velocity.
What would happen if the gravitational force was eliminated between the earth and sun?
The earth's constant orbit around the sun is caused by an equilibrium between two forces - the gravitational pull of the sun, and the earth's velocity acting at a right angle to it. If that gravitational pull was suddenly eliminated, the earth would continue onwards in a straight line.
What is true about an objects fall velocity as it approaches the earth's surface?
As an object falls towards the Earth's surface, its velocity increases due to the acceleration caused by gravity. Near the surface, the object will reach a terminal velocity where the force of air resistance equals the force of gravity, causing the object to fall at a constant speed.
What keeps the moon in motion?
Newton's first law of motion. If there is no net force on an object, then its velocity is constant. The object is either at rest (if its velocity is equal to zero), or it moves with constant speed in a single direction. The moon moves in a single direction about the earth because it is kept from drifting away by earth's gravity.
