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I want to know if, say mother earth, could be moved? How much energy would have to be applied to push a planet closer to it's sun or futher away? Also which force would more likely to move such a mass?
Drakkith said:Any amount of force will move the earth. The rate of change in velocity is inversely proportional to the mass of the object. For example, F=MA. The amount of force applied is equal to the mass of an object times the amount of acceleration. If you keep the force the same, you will have less acceleration as the mass increases.
If you jump off the ground you have effectively pushed the Earth slightly in the opposite direction. However the effect is so small that it is not noticeable.
qraal said:Problem with that Drakkith is that you fall back to Earth and cancel any motion you caused. Only escaping mass will produce a motion permanently. The mass has to escape really rapidly to produce a significant addition to Earth's momentum. If we wanted to drop Earth into the Sun, then the total velocity change is 30 km/s. If we use a photon drive to do that, exhaust velocity 300,000 km/s, then the mass converted to photons has to mass (30/3E+5) Earth's mass, or 1/10,000th, or about 1/100th the Moon's mass. A lot.
qraal said:Problem with that Drakkith is that you fall back to Earth and cancel any motion you caused. Only escaping mass will produce a motion permanently. The mass has to escape really rapidly to produce a significant addition to Earth's momentum. If we wanted to drop Earth into the Sun, then the total velocity change is 30 km/s. If we use a photon drive to do that, exhaust velocity 300,000 km/s, then the mass converted to photons has to mass (30/3E+5) Earth's mass, or 1/10,000th, or about 1/100th the Moon's mass. A lot.
narrator said:A few years ago there were some spectacular photos in the news when a comet or large meteorite hit Saturn or Jupiter. Sorry, I forget the details. Could a strike like that cause orbital problems?
narrator said:A few years ago there were some spectacular photos in the news when a comet or large meteorite hit Saturn or Jupiter. Sorry, I forget the details. Could a strike like that cause orbital problems?
qraal said:Problem with that Drakkith is that you fall back to Earth and cancel any motion you caused.
thebiggerbang said:Can you please explain how? :)
jslo5203 said:I am not interested in changing Earth's orbit, I see no practical benefit; however it would be beneficial to move the orbit of Venus somewhere outside Earth's orbit and let it cool for a while, until it was cool enough to visit, since Venus has similar mass to Earth all of our existing life support systems probably will function there with little or no change, so Venus would be easy to colonize. My first question would be: if a comet swung by Venus with enough mass and in the appropriate path, could its gravity pull nudge Venus to an orbit outside Earth's own? My second question is: assuming Venus moved to an outer orbit, how long would it take to cool down to temperatures similar to earth's?
The force needed to move a planet is calculated using Newton's second law of motion, which states that force (F) is equal to mass (m) multiplied by acceleration (a), or F = ma. To move a planet, a significant amount of force is needed to overcome its inertia, which is the tendency of an object to resist changes in its motion.
The force needed to move a planet is affected by several factors, including the mass of the planet, the distance it needs to be moved, and the gravitational pull of other celestial bodies. The larger the mass of the planet, the more force is needed to move it. Similarly, the farther it needs to be moved, the more force is required. The gravitational pull of other celestial bodies, such as the sun or other planets, can also affect the force needed to move a planet.
The force needed to move a planet differs for different planets because of their varying masses and distances from the sun. Generally, larger and more massive planets require more force to move, while smaller and less massive planets require less force. The distance from the sun also plays a role, as planets farther away from the sun require more force to move due to the weaker gravitational pull.
Yes, the force needed to move a planet can be calculated for any given planet using the formula F = ma. However, the exact force needed may vary depending on the specific circumstances, such as the current position of the planet and any external forces acting upon it.
No, it is not possible to move a planet without any force. Even the smallest movement of a planet requires some amount of force to overcome its inertia. Additionally, the gravitational pull of other celestial bodies constantly exerts a force on a planet, making it impossible for it to stay still without any force acting upon it.