Physics
Solid State Physics

# Would an object weigh more or less in vacuum?

101112 ###### 2010-12-15 13:00:49

An object will weigh more in vacuum than in air because of the upthrust. There is no upthrust in vacuum whereas in air the pressure pushes an object or person from all sides. The air is dense and it is similar like water where the weight of an object is equal to the weight of the water displaced by it.

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## Related Questions Objects under water seem to weigh less but they have the same mass as they would out of water. An object would weigh less on the Moon - about 6 times less - than the same object on the Earth. Anytime you are in a place with less gravity, you or any object will weigh less. The force of gravity on the moon is much less than on Earth. For an object that is already a solid the change in its temperature does not affect its weight by any noticeable amount. The only change would result from the volume decrease as the object contracts when cooled. By occupying less space, it would displace less air and that would decrease the buoyancy of the object. That, though, would cause the object to weigh (slightly) more. An object that weighs 10N on the surface of earth would weigh1.63N on the surface of the moon. That's less. I assume you mean, an object that weighs 50N on Earth. On the Moon, it would weigh less, by a factor of 6 approximately. it doesn't weigh any less. it has bouyancy, which means it floats. Almost - its the force of gravity that's being resisted (like your feet on the ground). You would weigh less because there is less gravity on mercury than on earth so you would weigh less! No. Weight is a function of gravitational force pushing down on an object.There is less gravity on the moon so the object would weigh less. A falling object would have less drag than in a classroom in a low pressure environment (higher up) or in a space or a vacuum, but then it's not really falling. Hope this clarifies. It would weigh less on the moon because the moon has a lower gravitational constant, the mass would stay the same. As an object accelerates toward the speed of light it's mass (and weight) increases, at the speed of light (c) the objects mass would be infinite, making it impossible for any object to accelerate to light speed. So, "no" an object does not weigh less by moving faster in a vacuum, the faster it goes the more it weighs and the slower time goes. The change in mass and time occurs because near light speed the variable "c" is more fixed and the remaining variables (time and mass) must change to maintain balance. Venus is slightly smaller than the earth and has less gravity, so we would weigh less on Venus than we do on Earth. To determine how much you would weigh on Venus you multiply your Earth weight by 0.9. On object of 100 pounds would weigh only 90 pounds on Venus.  You would probably weigh less cause there is no air on mercury. Mars is a smaller planet so the gravity is lower so you would have less pull on your mass so you would weigh less. weight is the measure of gravitational pull on an object. No, weight is the amount of force an object exerts on another. For example you push down on the Earth with a weight of approximately 600 Newtons whilst on the moon you would weigh less and in empty space you would weigh nothing. Mass is the amount of matter an object occupies and does not vary with your location. A speed just less than the speed of light in vacuum. Any object weighs more on the moon than it does on an asteroid or comet, but less than it weighs on earth ... only about 16% of its earthly weight. The weight of an object is relative to the gravitational pull that is there. The moon has less gravity than the earth so there is less force pulling it down. The gravitational pole is much weaker on the moon. Weight is the amount of gravity that pulls on an object. Yes, the mass of an object will never change where as the weight will change depending on the forces acting upon it. As there is less gravity on the moon, there will be less downward force acting on the object, therefore it will weigh less. On object falling under the force of gravity (9.8 m/s2) would, in a vacuum, fall a distance of 706 metres in 12 seconds. In a non-vacuum, i.e. air, the object would fall less distance in the same time due to drag.xt = 0.5 (9.8) t2 ###### PhysicsAstronomySpace Travel and ExplorationWeight and MassScienceThe MoonPlanet VenusPlanetary ScienceNumerical Analysis and SimulationPlanet Mercury Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.