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chetan
[SOLVED] Weight of planets
Does the weight of planets depend upon the speed of the planet and gravity ?
Does the weight of planets depend upon the speed of the planet and gravity ?
Originally posted by chetan
Does the weight of planets depend upon the speed of the planet and gravity ?
Originally posted by chetan
Does the weight of planets depend upon the speed of the planet and gravity ?
A change in the "speed" of a planet, defined as one in orbit, would only cause it to spiral inward if V is lost, or move outward from the parent body if V is gained. Too much +V could change the orbit, or sling it completely away from an orbit.Originally posted by marcus
hello Lurch and chetan, this is a thought-provoking question.
let's assume that chetan is asking if the MASS of a planet depends on the speed the planet is travelling
there are gravitational interactions that abruptly boost the speed of planets----the "slingshot" interaction with Jupiter for example can suddenly increase the speed of a small planet or asteroid to the extent that it leaves the solar system! We are lucky to have Jupiter where it is because it has "cleaned out" the inner solar system of many comet nuclei and stuff that could hit us, exactly by this "slingshot" effect.
So, imagine you are on a planet that suddenly gains a lot of speed. Does gravity get stronger? Interesting. thanks chetan for the idea
Originally posted by LURCH
Just to make it clear, are you asking what causes a planet to have its weight, what causes things on the planet to have weight, or how we measure the weight of a planet?
Maybe we need to get more basic. Weight and mass are not the same thing. Mass is defined as "A property of matter equal to the measure of an object's resistance to changes in either the speed or direction of its motion." Its essentially the quantity of matter in an object. (holding off on realtivity for the time being)Originally posted by chetan
How we measure the weight of a planet?
Very good point we should all keep in mind.Originally posted by russ_watters
Just an aside, I think some of those with more specific knowledge of physics (ie, knowing more than me) tend to look for a complicated answer in situations where it isn't warranted. This appears to me to be a basic question not needing any of the high end complexities that can be applied. [/B]
Sure there is. Its everywhere, even "deep-space" between galaxies, but there it would be very weak and would be "tugging" you from very many directions, seemingly randon.Originally posted by hawaiidude
just so no ones confused, mv^2/r=GmM/r^2...g is gravity but i thought there was no gravity in space?
In the classical sense, space itself doesn't have "gravity" - gravity is a force between two bodies with mass (as the equation says). So that means ANY two bodies with mass ANYWHERE have a calculable gravitational attraction between them.Originally posted by hawaiidude
just so no ones confused, mv^2/r=GmM/r^2...g is gravity but i thought there was no gravity in space?
The weight of a planet has a direct impact on its speed. According to Newton's second law of motion, the greater the mass (or weight) of an object, the more force is needed to accelerate it. In the case of planets, this means that the more massive a planet is, the higher its speed will need to be in order to maintain a stable orbit.
Yes, there is a strong correlation between a planet's gravity and its weight. Gravity is the force that attracts objects towards each other, and the strength of this force is directly related to the mass (or weight) of the objects. Therefore, the more massive a planet is, the stronger its gravitational pull will be.
Yes, a planet's speed can change without affecting its weight. This is because weight is a measure of the force of gravity acting on an object, while speed is a measure of how fast an object is moving. These are two separate factors that can change independently of each other.
The distance from a planet's center has a direct effect on its weight. As the distance from the planet's center increases, the gravitational force acting on an object decreases. This means that objects on the surface of a planet will have a greater weight than those at a greater distance from the center.
No, a planet's speed does not affect its weight. As mentioned earlier, weight is a measure of the force of gravity acting on an object, while speed is a measure of how fast an object is moving. These are two separate factors that are not directly related to each other.