which one is heavier 100 kg cotton or 100kg iron ?
Answers
100kg iron is heavier than 100kg cotton.
Solution:
We are to find that which is heavier - 100 kg of cotton or 100kg of iron.
To measure the heaviness of anything, we are to compare their weight and mass. Mass is the “amount of matter” a thing contains while weight can be defined as the measurement of “pull of gravity” on an object. Weight of a thing varies with the mass of objects and the difference between their masses.
We can conclude that gravitational pull of iron is more than that of the cotton. Hence, 100kg of iron will be more heavier than 100 kg of cotton.
Answer: in terms of heaviness, it is said they both weigh the same, that is 100 kg each. So they they both are same weight. On a tipping scale, the weight bar pointer needle will say same, 100 kg each.
Explanation:
The calculation of the heaviness of objects is the MEASURE of effect of gravitational PULL on the mass of completely stationary objects towards earth against a calibrated scale.
And a COMPARISON between two objects, for such gravitational pull measure requires a standard calibrated instrument.
To get an equal measure of gravitational pull on two different objects on a calibrated instrument will require increasing or decreasing the masses of either of the objects by adding or subtracting their like material. Once they both read the same weight on the instrument, than it is concluded that they both are equal in weight.
Heaviness is detected by weight. The answer that 100kg weight of iron is heavier is wrong.
Though iron is heavier than cotton, but if they are both made equal in weight of 100kg, than they are equally heavy. They can vary in size and quantity but are equally heavy.
You don’t have to determine heaviness of 100kg iron and cotton by letting them fall through air. All you need is a scale, and every time you weigh them, they will be same, 100kg each.
A 100 kg bale of cotton will be much bigger in size compared to the small compact 100kg of iron.
The reason the 100 kg cotton bale will reach earth later than the compact 100 kg iron is due to resistance and friction against air due to size of the bale and say, compact iron cube. But suppose the shape and size factor was made same by melting and making the the iron in a cube exactly same size as the cube of compact cotton bale and the surface of the cotton bale was made as smooth as the surface of the iron cube than the chances are, they both will fall to earth at the same time. A small fraction may delay either cube during the fall due to the cubes assuming different positions in air during fall.
As they fall, sometimes a cubes flat surface will be against the air and sometimes the cube will be diagonal, thus sometimes less restriction and friction and sometimes more.
But end of the fall story will be, they both will weigh same and be heavy as 100 kg.
Notes: other factors which can cause milli seconds delays are, humidity in air in the paths of the cubes, density of air molecules present in the path of the cubes. But they will still weigh the same...unless the cotton bale absorbs moisture from the atmosphere and weigh milli micro grams more.