Questions tagged [weight]

Weight is the force on the object due to gravity. DO NOT USE weight as a colloquial substitute for mass.

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How much does the sky weigh? [closed]

How much does the sky weigh? I don't know how much the sky weighs. Is the sky gravity? I tried researching, but I can't find scientific information that is proven.
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How to calculate the distributed weight across multiple "scales" (points)

Intro As the title says, I'm looking for a way to calculate the weight (or even better, the percentage of weight) at multiple points on a rigid object. Long story short, I'm making a game and need to ...
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How to control the balance of a floating object?

I have this 3D printed object which I hope to float water. I added my printed object to a piece of foam (Glued) and then gently put it on the surface of the water. Every time I put it, it flips over ...
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Does two objects of the same mass weigh differently in moon and earth if their densities are different? [duplicate]

you have a bag of cotton and an iron bar, each indicating same mass when measured on a weighing machine kept on earth. if you weigh the two objects in moon, which (if any) will weigh higher?
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How does adding air make something more light?

Say a completely deflated balloon weighs 5 grams. When you add air, the balloon becomes lighter. But the air just adds more weight and does not decrease any weight. Let's say the air weighed 0.5 grams ...
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Tension force in kilograms [closed]

Suppose I want to buy a cable that will support & pull a mass of $2\ kg$ upward at an acceleration rate of $2 m/s^2$, I must specify the maximum mass the cable will carry. I know how to calculate ...
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Weight on a scale

imagine that you're at the baggage weigh in point at an airport. your luggage is on the scale and you try to cheat the price by pivoting your heel on the ground and toe beneath one end of the suitcase ...
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What is actually weight?

When a book is kept on the table than gravity of earth is attracting the book downwards and gravity of book attract earth this is action reaction pair Now here are two more force acting normal ...
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What is the weight of an object that accelerates upwards?

I belong to the aerospace community, and a basic concept among the people of this community is that an aircraft is called to be in 'steady flight' when the lift force balances out the weight of the ...
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On the difference between mass and weight as it applies to formulae

How exactly does weight work in terms of various formulae include mass? For instance, for the momentum of an object, does momentum increase with greater gravity? Or is it only dependent upon mass ...
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Can weight of a body cause tipping (friction) about any point?

In a problem regarding below figure given body is tipping about point A. In textbooks the examples given always were tipping of body due to external force . Is it possible for a body to tipping due to ...
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Is there a formal definition for apparent weight?

Is there a formal definition for the apparent weight that does not depend on the situation? For example, when a body stands on a solid floor the apparent weight is defined via force that floor exerts ...
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Do lifting magnets share the weight of objects they are attracting?

I've done some research and people have said the object the magnet is lifting up against gravity is exerting the same magnitude of lifting force downwards on the lifting magnet. If whatever is ...
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How to find apparent weight?

Is there a universal formula for finding the apparent weight of an object in a particular situation? I heard that it is the net of all forces acting on the object in the vertical direction? Is this ...
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Are normal force and apparent weight the same?

Are normal force and apparent weight the same thing? I'll let ya know the context from which I am asking this question: Is there a normal force on an object submerged in water? So, from what I ...
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Can the apparent weight in a elevator accelerating downwards be compared to that of body submerged in a fluid

Can the apparent weight of a person ( here I mean what a weighing scale would read if that person were to stand on it ) in a elevator going downwards( NOTE: the acceleration is less than the ...
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What impact does air have on our weight?

Although air is light, it is fluid. So it must exert upthrust on people. So does it mean, in fact, we are heavier than our weight? Also, the gravitational acceleration is bigger than its value?
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Does general relativity predict different forces on aircraft than Newtonian mechanics?

When taught how airplanes fly, we are probably always given the Newtonian mechanism: that four forces act on an airplane; lift and weight on the vertical axis, and thrust and drag on the horizontal ...
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Is the non-technical definition of weight same as mass or is it also affected by gravity?

Technically, weight is the force which an object applies in downward direction, with Newton as its SI unit. However in non-technical usage, weight is a measure of heaviness or lightness of an object, ...
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Simple dynamics im really confused

So my question is a little dumb: if an object on a scale has a weight that points downwards and the scale exerts normal force on the object upwards, cancelling the forces acted on the object then what ...
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If 1 gram force on Earth is 0.0098 N, what would it be on Mars or others?

I know that this is a very simple question, but I am not really sure about this. If 1 gram force on Earth is $0.001 \;\text{kg} \times 9.8 \;\text{m}\,\text{s}^{-2}$, what would it be on Mars or any ...
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Why $\rm kg$ in daily life but not $\rm kg~m/s^2$? [duplicate]

I had a question regarding weight so here I begin W=mg (where w=weight,m=mass,g=gravitational acceleration) w= kg*m/s^2(kg is the si unit for mass and weight , m/s^2 is the si unit of gravitation) w= ...
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Why do physics textbooks mention weight when saying mass? [duplicate]

I've always found in physics textbooks (and in general too) that when a paragraph or question mentions mass it actually is succeeded by weight of the object in question. For example, The mass of the ...
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Why is weight in a fluid not equal to the buoyant force?

We know that, weight is the normal force acting on us. And for this 'normal force' to exist 'something' has to be under us. My question is when we're in water on any other fluid, is that fluid that '...
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Why is the weight of object is not included as a force pushing an object down in fluid?

In fluid mechanism, I have one doubt always, When calculating the force upon object They said force pushing object down is $F=PA$ ($P$=atmosphere pressure, $A$=surafce area of object) But why don't we ...
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Do things weigh the same in different orientations?

What experiments have been done to check that objects weigh the same in different orientations? To what accuracy has it been checked that the two weights of the same object in the positions below (for ...
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How is light affecting the weight of different colored objects?

I was told here that light can move an object and that it pushed against it. Lets say I have objects of the colors Red, Green, Blue, Yellow, Magenta and Cyan, each placed on different balances that ...
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Weight dependency on the location on Earth relative to Sun

In this post a theoretical physicist says that one will weigh less at the point on the Earth closest to the Sun due to the Sun's gravity, which makes sense to me. But he also says that one will weigh ...
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How would a weightless object behave on earth?

DISCLAIMER: Bear in mind that I am a mere 11th-grader: It came to me that an object with a net zero pounds (on earth) might sit more-or-less statically in the air. An example might be a ball of ...
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Max angle to avoid cart crash [closed]

How can I calculate max angle to avoid my cart to roll out or crash ? I need to move a weight of 3 kg at a height of 2 m, with a cart that weights 20 kg. Here attached an image: I would like to find ...
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Discuss the possibility of using force rather than mass as the basic quantity. (Kibble, Classical Mechanics)

I'm starting first year in the Autumn and I'm doing some pre-university maths and physics. One of the questions I had a go at doing was this one, from Classical Mechanics by Kibble: Discuss the ...
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If you laid a perfectly level beam on a centered scale and an off-center scale, what weight would each scale measure?

Imagine you laid a metal beam on a scale so that the scale was in the center of the beam, so it would be balanced and not fall off. The scale would display the full weight of the beam. But what if you ...
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Astronauts being able to move "heavier" objects easily in space

I was watching this video where the astronauts demonstrate how an object that would weigh some large amount on Earth is nearly weightless in the microgravity experienced onboard the ISS. What I don't ...
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The Koi Pond Observation Tower Conundrum [closed]

I am building a koi pond. I want to install an observation tower. The observation tower is made of glass, either cuboid,cylindrical or hexagonal. The bottom of the tower sits on a frame which is just ...
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Calculating the change in position of center of mass when additional weight is added to a non uniform object

Hi guys I have a good fundamental on basic calculations for position of center of mass, however I am having troubles creating my modelling for my problem as stated above. To make the model easier, let'...
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Why does the reading of load cell changes with change in the mounting styles?

I'm working on a project in which I have connected the loadcell to Arduino via the HX711 ADC. I mounted the load cell in two different configurations as shown in the image. With the connections, ...
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Why is weight comparison transitive?

Suppose I have a regular pair of weight-comparison scales sitting on my kitchen table, and three weights. When I place A on either side and B on the other, the "B" side always goes down. ...
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Does a floating ship increase the pressure on a scuba diver?

In the article Ship Traffic Increases Dramatically, to Oceans' Detriment , there is a quote (emphasis mine) : "I was surprised to see that in 20 years, the growth is almost fourfold, or almost ...
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Difference between Kilogram-weight and mass

I got really confused about this $\text{kg-wt}$ and mass when I went through a question which says A body weighs $700\text{ kg-wt}$ on Earth surface. How much will it weigh on the surface of a planet ...
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What is Newton's original definition of mass?

What is Newton's original definition of mass. The following is from the English translation of Newton's Principia by Andrew Motte. "The quantity of matter is the measure of the same, arising ...
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What does it mean that the relationship between material mass and weight is constant and proportional?

I hope someone can help me with this apparently very basic doubt, but I feel like a stupid monkey trying to join two sticks to reach bananas and without success. My English is not good, I am Mexican ...
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Got confused about weight loss in liquid [closed]

Suppose two objects of the same mass but of different densities are dropped on water. The large object (say polypropylene) has a lower density than water and the small one (say stainless steel) has a ...
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Understanding what a scale outputs and converting between Mass and Weight

I understand that weight is a measure of force acting on an object due to gravity and mass is a measurement of the quantity of matter than an object contains. With mass having units of kilograms or ...
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Weight in Newtonian mechanics

What do we mean by the term weight? Is it an upward force exerted by an object to counteract the downward force of gravity (or) is it the downward force itself? Is the magnitude of the weight always ...
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Measuring Weight with Multiple Scales

If I am weighting a long tube of (nearly) uniform weight with multiple hang-scales (really a 10-ft long Helical Antenna), how do I calculate the total weight from the multiple scales? Can I just add ...
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Measuring the correct mass or weight of an object in the presence of atmospheric pressure?

I know due to atmospheric pressure the weight of an object increases, but when we take measurements we do not omit the weight of the column of air above it. So, doesn't it affect the accuracy of our ...
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Pressure inside when a container is closed

Let us suppose that there is a container with its lid open sitting at the bottom of an ocean. The pressure at the bottom of the container will depend on the water column above it assuming only static ...
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What is the weight of body on inclined plane? [closed]

If weighing machine is kept on inclined plane,and a person measures his weight on the scale,will he get less or more weight on scale Acc to me mg cos theta will be shown in the weighing scale, so if ...
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How can we find the total weight of a pulley apparatus? [closed]

I recently have been trying to solve this problem, which asks me to find T3 assuming that g = 9.8: My idea was to find the ...
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Weight exerted by two blocks of metal [closed]

Can 2 blocks, composed of different metals, have the same masses but different volumes and still have the same weight if hung on a spring balance?
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