Newton postulated that when 2 objects (feather, stone) are thrown from a height will fall to the ground CONTD

Question

at the same time regardless of their mass. But we do not see this in the case of feather and stone...Plz explain!

Answer 1

Galileo postulated the "feather drop" which states that when a feather and a stone are dropped from the same height, both objects will hit the ground at the same time.

We see that the feather and a stone fall at different rates when dropped from a certain height because there is air resistance. The feather will be affected by the air when falling and reaching terminal velocity before the stone will. Therefore, the feather will fall more slowly than the stone.

However, if somehow we were to remove the air and then drop the feather and the stone, both the feather and the stone will fall and hit the ground at exactly the same time. Since gravity will cause the same acceleration in both objects (feather and the stone) of 9.80 m/s^2 downwards, both objects will accelerate uniformly at the same rate towards the ground. Hence, both objects will hit the ground at the same time, as long as we are able to ignore air resistance.

Answer 2

Both the stone and feather when made to fall in air, the air resists the falling down of stone and feather.

In the case of feather the resistance is high and hence feather slowly gets down.

If we do the experiment in vacuum both will fall simultaneously.

In colleges and schools where there are facilities to make vacuum in a closed tall jar the experiment is usually demonstrated.

But with a simple experiment one can do the same in the following simple way to understand the motion of light object and heavy object in air.

In one hand let us keep a small book and in another hand a small bit of paper.

Drop them simultaneously. The book reaches the ground first and the paper takes a long time to reach the ground.

Now keeping that paper on the book let us drop them. Since there is practically no air between the book and paper, both reach the ground simultaneously.

This simple experiment is self explanatory of the above fact.

Answer 3

Look, newton postulated that gravity pullls everything towards itself with the same acceleration. This postulate was made on the assumpution that external forces such as air, don't affect the motion of the object. It has been proved that if a feather and a coin are placed in a vaccumized container, then they reach the bottom of the container at the same time.

Answer 4

Its simple, that postulate is true only in case earth did not have atmosphere or air to provide resistance to the feather. So if you were to remove the air around earth and drop a feather & stone from a tower ... they would reach the ground at the same time.

Answer 5

That in basic terms happens if u throw it in the worldwide. Why? because of the fact there is air, which reasons resistance (something like friction). Air resistance is an upward tension which acts against the gravitational tension of the earth appearing on the object in contact. The downward tension is given via the formula W=mg, this is the mass circumstances gravitational acceleration. As an merchandise falls, its acceleration lessens, till a factor the place that falling merchandise is in equilibrium. (which we are saying that the object has performed terminal velocity, i.e. this is falling at a persevering with velocity). Now, an merchandise with a better mass might take plenty longer a time to realize terminal velocity because of the fact its downward tension is plenty extra effective. this ability that it falls with a swifter well-known velocity and can gain a better terminal velocity. p/s pls verify ur textbook to work out if i'm astonishing, i may be incorrect...

Answer 6

MOST IMPORTANTLY LAW IS APPLICABLE TO SOLID RIGID BODIES OF VARYING MASSES.
THIS is totally irrespective of the mass of the body,as feathers has many pores which actually increases its resistance (air drag) and hence feathers falls in a haphazid manner.as against the stone and certainly takes more time than stone!hence it is actually the manner and not the mass of the body that counts.in ur case.

Answer 7

This assumes that they are in a vacuum. When you drop a feather it has a lot of air resistance because the feather is so fluffy. The air resistance slows it down. If you do the same test in a vacuum, they will fall in the same time. If you don't have a vacuum, try dropping a heavy rock and a light pillow. They will have similar drag and you will see that something very light falls just as fast as something very heavy.

Answer 8

actually,that happens in vacuum.It does not happen in the presence of the air.The reason for this is-
the surface area of the feather is more compared to the stone.The friction of the air delays the fall of the feather.
4 example,
take 2 sheets of paper of the same shape & mass.Crumple one of them throw them at a time from a height.You can see that the crumpled paper falls more quicker.

Answer 9

The experiment has to be done in a vacuum and the objects are supposed to be dropped from the same height not thrown.

Answer 10

It does happen in a vacuum. On the moon, an astronaut dropped a feather and a hammer and they hit the groudn at the same time.