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Why do you always have kinetic energy if you use the sun as a frame of reference?
Wiki User
∙ 13y ago
because we are rotating around the sun so we are moving :)
Wiki User
∙ 13y ago
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What would the kinetic energy of a rock sitting on the ground be?
Zero. You need to think in terms of "frame of reference" as in what are you comparing the rock to. If you are an observer sitting next to the rock then the kinetic energy of the rock RELATIVE TO YOU is zero - I.E. the rock isn't moving relative to you and thus has no kinetic energy - energy of motion - relative to you. If you are an observer sitting a million miles from earth watching the rock then it is zipping around at 1000 miles per hour as the earth spins on its axis and it has significant kinetic energy RELATIVE TO YOU. You need to think in terms of "frame of reference" as in what are you comparing the rock to. If you are an observer sitting next to the rock then the kinetic energy of the rock RELATIVE TO YOU is zero - i.e. the rock isn't moving relative to you and thus has no kinetic energy - energy of motion - relative to you. If you are an observer sitting a million miles from earth watching the rock then it is zipping around at 1000 miles per hour as the earth spins on its axis and it has significant kinetic energy RELATIVE TO YOU. ---- So we don't get bored, no kinetic and no gravitational potential energy.
What three things does gravitational kineicenergy depend on?
The concept of Gravitational Kinetic Energy is has three components that it is dependent upon. The volume, the mass and the heat of the elements that are part of the reference frame when looking the inner workings of this energy.
Does a person standing motionless in the aisle of a moving bus have kinetic energy?
Velocity depends on the point of view, or as they say in physics, on the "frame of reference". The amount of kinetic energy depends on velocity, and therefore, it also depends on the frame of reference.From the point of view of someone else who is also standing in the bus, such as person would have zero velocity and zero kinetic energy. From the point of view of one who watches the bus from the outside (standing still, near the road for example), the velocity, and therefore also the kinetic energy, of the person being considered will be non-zero.
Can electric flux be negative?
Potential energy has to be defined within a frame of reference (much like motion is relative). So if you define "the ground" as 0 gravitational potential energy, then anything sitting on the ground will have 0 potential energy. There is really no such thing as an "absolute potential energy" anymore than there is a body that is absolutely stationary (at rest, 0 kinetic energy, without regard to frame of reference). All motion is relative, as is potential energy.
Does a person standing motionless in a aisle of a moving bus have kinetic energy?
Yes. The person has a mass m and has the same velocity as the bus v, so has a kinetic energy E, where E = 1/2 * m *v^2 Obvioulsy, it all depends on your frame of reference, since this kinetic energy is due to the velocity of the person relative to the road due to the bus moving on that road at velocity v.
Is standing kinetic or potential energy?
It is not kinetic energy. Whether or not it is potential energy depends on the frame of reference.
Total kinetic energy of zero?
Anything that's standing still (within the frame of reference).
A Plane flying past a non-moving observer has kinetic energy in the reference frame of this observer the same plane has how much kinetic energy in the reference frame which moves with the plane?
Zero. I am currently sitting in my chair in my room. If the plane is my chair and my room is the reference plane as long as I don't move my chair around the room it has no kinetic energy. Now if I expand my reference plane to an observer on the sun (I know) they are going to see me and my chair hauling butt at about 30km/s around the solar system along with my room my house and the rest of the planet this velocity and my mass mean there is kinetic energy. Ek=.5mv^2
Does the Kinetic Energy of an object depends on the frame of reference in which its motion is measured?
Work is force X distance travelled. Force is mass x acceleration. Aceeleration depends on the frame of reference from which one is measuring it. Hence work done depend on the frame of reference from which one is measuring it. QED
Does the work done by the net force acting on a particle depend on the inertial reference frame of the observer.does the change in kinetic energy so dependent if so?
When you lift a brick and throw it, nobody asks which inertial frame of reference you are using. No.
Energy can be formally defined as?
Kinetic energy is the amount of energy in an object due to its motion. It is defined as the amount of work that was required to accelerate the object from rest to its current velocity. In classical Newtonian physics, kinetic energy is calcualted in the following equation.Ek=1/2mv2Where:Ek is the kinetic energy of a body;m is the mass of the body; andv is the velocity of the body.Note that kinetic energy is always relative to the observer's frame of reference. For example, a girl holding a ball still would tell you the ball has no kinetic energy, because it is not moving - it has a velocity of zero, and according to the above equation, the kinetic energy must also be zero. Even if she were in a moving car holding the ball, she would still tell you (correctly) that the ball has no kinetic energy, because from her perspective, the ball is not moving. But from a bystander's perspective on the sidewalk, the ball (and the girl, the car, etc.) would indeed have kinetic energy, because, from the bystander's frame of reference, the ball is moving.
What is the kinetic energy of a person on a treadmill?
There is no single answer. Velocity is relative, and that means that the kinetic energy of a body also is relative. To calculate the kinetic energy you have to choose a reference frame, and the answer will be different depending on if you choose the person, the belt of the treadmill or the moon. Neither answer is more right or wrong than any other.
Does everyhting have energy?
Basically yes. There are different types of energy; for example: * Kinetic energy: Every moving object has kinetic energy. Whether an object is moving or not depends on the reference frame you choose. * Gravitational potential energy: Once again, you need to choose a reference point - or actually, a reference height in this case. Anything above the chosen reference height will have positive potential energy; anything below it, negative potential energy. * Heat energy: Since you can't cool any object to absolute zero, any object will have at least some heat energy.
What would the kinetic energy of a rock sitting on the ground be?
Zero. You need to think in terms of "frame of reference" as in what are you comparing the rock to. If you are an observer sitting next to the rock then the kinetic energy of the rock RELATIVE TO YOU is zero - I.E. the rock isn't moving relative to you and thus has no kinetic energy - energy of motion - relative to you. If you are an observer sitting a million miles from earth watching the rock then it is zipping around at 1000 miles per hour as the earth spins on its axis and it has significant kinetic energy RELATIVE TO YOU. You need to think in terms of "frame of reference" as in what are you comparing the rock to. If you are an observer sitting next to the rock then the kinetic energy of the rock RELATIVE TO YOU is zero - i.e. the rock isn't moving relative to you and thus has no kinetic energy - energy of motion - relative to you. If you are an observer sitting a million miles from earth watching the rock then it is zipping around at 1000 miles per hour as the earth spins on its axis and it has significant kinetic energy RELATIVE TO YOU. ---- So we don't get bored, no kinetic and no gravitational potential energy.
What three things does gravitational kineicenergy depend on?
The concept of Gravitational Kinetic Energy is has three components that it is dependent upon. The volume, the mass and the heat of the elements that are part of the reference frame when looking the inner workings of this energy.
Does a person standing in motionless in the aisle of a moving bus have kinetic energy?
Velocity depends on the point of view, or as they say in physics, on the "frame of reference". The amount of kinetic energy depends on velocity, and therefore, it also depends on the frame of reference.From the point of view of someone else who is also standing in the bus, such as person would have zero velocity and zero kinetic energy. From the point of view of one who watches the bus from the outside (standing still, near the road for example), the velocity, and therefore also the kinetic energy, of the person being considered will be non-zero.
Does a person standing motionless in the aisle of a moving bus have kinetic energy?
Velocity depends on the point of view, or as they say in physics, on the "frame of reference". The amount of kinetic energy depends on velocity, and therefore, it also depends on the frame of reference.From the point of view of someone else who is also standing in the bus, such as person would have zero velocity and zero kinetic energy. From the point of view of one who watches the bus from the outside (standing still, near the road for example), the velocity, and therefore also the kinetic energy, of the person being considered will be non-zero.
