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Sampad Saha
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In Earth due to gravity if m is greater, greater the force need to move it..but what in case of space where has no gravity ?
What is the importance of Mass in out of gravity i.e out o?
In summary: So in summary, on Earth due to gravity if m is greater, greater the force need to move it. However, in space where there is no gravity, what makes you think Force is still "mass time acceleration" and not reduced? Why does the moon stay in orbit?
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Vanadium 50
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What makes you think in space there is no gravity? Why does the moon stay in orbit?
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Sampad Saha
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Thanks to help...it was a silly mistake of my ...dean barry said:
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Sampad Saha
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...sorry ...it was a silly mistake of my ...Vanadium 50 said:
- #6
dean barry
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Glad to help, shift the mass from one to the other as you like, re-calculate the orbital data using the attached sheet.
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HallsofIvy
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You seem to be confused about several things. "On Earth due to gravity", it is harder to lift an object of greater mass because of its greater weight. On the other hand, it is not necessarily harder to move it horizontally. If there is friction, then the friction force will be proportional to the weight so greater for a more massive object, but if there is no friction, gravity will play no part.Sampad Saha said:
Either on a frictionless surface or in space, far from any massive object, so that gravitational force is negligible (not 0), we still have inertia, Force is still "mass time acceleration" so a greater force is needed to start (or stop) the motion of a massive object- but not to keep it moving.
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Delta2
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Newton's 2nd law F=ma or a=F/m holds everywhere so the greater the mass m is the more force F we have to put in order to achieve the same acceleration a. if we put [itex]F=F_{external}-B [/itex]and since the weight B is reduced in space due to the increased distance from Earth we can say we can put less force [itex]F_{external}[/itex] to achieve the same acceleration a, but i feel this is not what we had in our minds when we talk about this.
However what i believe we had in mind and happens inside a space station or a space shuttle in orbit around the Earth is that the gravity from Earth acts as a centripetal force rather than a pull down force. Inside a space station you just don't feel the gravitational pull from Earth though it exists, so i guess from that, one might get the delusion that gravity doesn't exist in space or that is easier to move things in space.
However what i believe we had in mind and happens inside a space station or a space shuttle in orbit around the Earth is that the gravity from Earth acts as a centripetal force rather than a pull down force. Inside a space station you just don't feel the gravitational pull from Earth though it exists, so i guess from that, one might get the delusion that gravity doesn't exist in space or that is easier to move things in space.
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Related to What is the importance of Mass in out of gravity i.e out o?
1. What is mass and how does it relate to gravity?
Mass is a measure of the amount of matter in an object. In terms of gravity, the more mass an object has, the stronger its gravitational pull will be. This is why larger objects, such as planets, have a stronger gravitational force than smaller objects, such as rocks.
2. Why is mass important in space or out of gravity?
In space or out of gravity, objects are affected by the force of gravity in a different way compared to on Earth. Without the presence of gravity, mass is the only factor that determines an object's inertia and its response to external forces. This makes mass a crucial element in understanding the motion and behavior of objects in space.
3. How does mass affect the motion of objects in space?
Mass plays a key role in determining the motion of objects in space. According to Newton's first law of motion, an object at rest will remain at rest, and an object in motion will remain in motion at a constant speed and direction unless acted upon by an external force. In space, the only external force acting on an object is gravity, which is dependent on the mass of the object. Therefore, an object with a larger mass will have a greater resistance to changes in its motion compared to an object with a smaller mass.
4. Can mass be changed in space?
Yes, the mass of an object can be changed in space. Mass is not a fixed quantity and can be altered through various processes such as adding or removing matter from an object, or converting matter into energy. However, the total mass of a closed system is always conserved, meaning that the total amount of matter and energy within the system remains constant.
5. How does the concept of mass differ from weight in space?
In space or out of gravity, mass and weight are two different concepts. Mass refers to the amount of matter an object contains, while weight refers to the force of gravity acting on an object. In space, where gravity is significantly weaker, an object's weight may change, but its mass remains the same. This is why astronauts appear to be weightless in space, even though they still have the same mass as they do on Earth.
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