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Density, the atoms in a a kg of lead will be a closely packed solid, a kg of feathers will be a lot more spread out and surrounded by air..

That is assuming both your lead and feathers are under standard conditions..

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15y ago
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11y ago

It's a trick question, but with a not-so-trick answer:

The expected "correct" answer, is that since both "weigh" 1kg, they both have the same weight, and so neither one is heavier.

The CORRECT answer actually depends on a few more details, which will be explained in steps as follows:

1) The kg is a unit of mass, whilst weight, in the correct meaning of the word, is a measurement of forcemeasured in Newtons.

2) Force = mass x acceleration

-> Weight = mass x acceleration-due-to-gravity (g = 9.81 m/s2)

So up until now, we could argue that the metal and the feathers each have a weight of approx. 9.81 Newtons. However, so far we've only calculated the downward force on the two objects due to gravity.

Assuming that we're measuring the weight of these two objects somewhere on Earth, we must also consider the effects of the Earth's atmosphere, specifically the upward force this causes. Since air is a fluid, we must consider the effects of upthrust on these two objects:

3) Upthrust = weight-of-displaced-fluid

Now this is where things start to get interesting! Since we can safely assume that metal is more dense than feathers, then for the two objects to have the same mass of 1kg, the volume of the feathers must be greater than the volume the metal. Therefore, they will displace more of the fluid (air):

4) Metal-upthrust < Feathers-upthrust

So, getting back to weight:

5) Weight = downforce-due-to-gravity - upthrust-from-fluid

So, since the downforce due to gravity is equal in both instances, BUT the feathers produce more upthrust, the weight of the metal is, in fact, greater than the weight of the feathers.

Therefore, if they are both measured at the same location on Earth, 1kg of metal will be heavier than 1kg of feathers.

(Just don't tell your school Physics teacher this, unless you want him to think you're a smart-ass :-)

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14y ago

Lead has a much higher density than feathers; 1 kg. of it fits into a smaller volume.

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14y ago

They both have a mass of 1 kilogram, therefore they have equal mass.

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13y ago

They weigh the same - duh.

It's ONE kilogram.

Sure, the volume of cornflakes equal to a kilogram would be more than the volume of lead, but it is still one kilogram of each.

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9y ago

Neither. Since they both have a weight of 1kg one cannot be heavier than the other.

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14y ago

both have the same mass

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13y ago

They simply have the same weight.

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13y ago

both because they are both one gram

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9y ago

A kilogram of anything weighs a kilogram

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Q: Which has greater mass 1.0 kilogram of feathers or 1.0 kilogram of lead?
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Why the air resistance decrease the acceleration on falling object?

Drop a pound of feathers (in a bag) and a pound of lead from a height. The smaller mass of the lead will let it fall faster due to less air resistance, than the greater mass and much greater air resistance of the feathers.


Why does a kilogram of bricks take up a much smaller space than a kilogram of feathers?

Sand is denser than feathers. Since a given volume of a denser material has more mass than the same volume of a less dense material, when you make the masses the same, the volumes must vary.


Which has more mass a kilogram of steel or a kilogram of feathers?

The "kilogram" is a unit of mass. Every kilogram has the same mass, no matterof what substance.The question is much like asking: "Which is longer, a mile in a car or a mile on a bicycle ?"


Is a kilogram have greater mass than gram?

Yes 1 kilogram = 1000 grams 1 gram = 0.001 kilograms


Which weighs more a kilogram of feathers or 2.3 pounds of lead?

A kilogram of feathers is 1kg 2.3 pounds of lead is 1.04326245 kilograms Using Newton's First Law We have that Fnet = ma This meaning that the net force of the 2 items is due to the product of the objects mass and the acceleration which acts upon it. The result is measured in Newtons. The acceleration in this case is gravity which is 9.8 m/s2 average here in the earth, this value changes due to the position the object is in the earth, the closer you are to the equator the closer you are to 9.8 m/s2. Now We have that 1kg of feathers weights = (1kg) * (9.8m/s2) = 9.8 N 1.04326245 kg of lead weights = (1.04326245kg) * (9.8m/s2) = 10.22397201 N Now we can conclude that 2.3 lbs of lead weight more than 1kg of feathers.

Related questions

What would have the larger mass a kilogram of lead or a kilogram of feathers?

A kilogram is a measure of mass therefore a kilogram of lead and a kilogram of feathers have the same mass: one kilogram. They would, however, have different volumes and densities.


Which has the greater mass a kilogram of feathers or kilogram of bricks?

Neither. A kilogram is the same regardless.


Which has a greater mass a kilogram of bricks or a kilogram of feathers?

They both have the same mass. A kilogram measure mass regardless of the material, volume etc.


Is the mass of one pound of lead greater than less than or equal to the mass of one pound of feathers?

The mass of feathers is far greater than the lead. amount = mass So you will have a huge pile of feathers compared to a small chunk of lead to equal a pound


Which has more mass 1 kilogram of feathers or 1 kilogram of bricks?

Neither. They both have the same mass. "kg" is a measurement of mass. If you meant volume (the space taken up by the object), the feathers would have the greater volume.


Which has greater mass 1 L of feathers or 1 L of lead?

One litre of feathers would have far less mass than one litre of lead.


Which has the greatest volume a kilogram of butter or a kilogram of lead?

Butter has greater volume than lead because butter has more mass.


Why would 1 kilogram of lead be less awkward to carry around than 1 kilogram of feathers?

Because of its' mass density. The lead would be much smaller in size.


What has more mass 1 kg of lead or 1 kg of feathers?

Neither!!! They both have the same mass at 1 kg. However, the feathers will occupy a greater volume.


Which has a larger mass one kilogram of gold or one kilogram of feathers?

Their mass is 1 kg.


What has more mass 10 kilograms of feathers or 6 kilograms of lead?

10 kg is greater than 6 kg. kg is the unit of mass. Hence feather has more mass than lead in this case.


Why the air resistance decrease the acceleration on falling object?

Drop a pound of feathers (in a bag) and a pound of lead from a height. The smaller mass of the lead will let it fall faster due to less air resistance, than the greater mass and much greater air resistance of the feathers.