Is it true that when there is no air a coin & a feather fall at the same rate?

Question

Does a coin fall at the same rate as a feather when there is no air?

Answer 1

Yes it is true and the reason is very simple one. Any object falls down due to the force of gravity. So the force on the object is
mass of that object X 'g'.
so the acceleration of the object is
force / mass = mass of that object X 'g' / mass of that object.

since the mass of the object cancels out so weather drop object of any mass it should hav the same acceleration and so the time taken by it to reach ground from same height will be same .

But with the presence of the air story gets changed. air opposes the motion of object thru it and this oppose depends on the relative speed with air. As with acceleration the object tries to accelerate the air starts to oppose it much intensively. generally the feather hav more surface area so they feel more opposition and so it comes down late then a coin.

Answer 2

No. When falling, objects accellerate due to the influence of gravity. So they start from zero speed and, if there are no external influences,(air, magnetism, electricity, light etc.) then they continue to accelarate until they hit something. The speed is never constant - always changing. What is true that in these conditions both a feather and a coin will take the same TIME to fall the same distance.

In a laboratory tube there could be influences such as static electricity which will influence the feather more than the coin.

Light excerts a force which will have more effect on the larger feather so the experiment must be carried out in the dark (how do you measure in the dark?)

Magnetism (the Earth's or other) could have an effect on a conductive object such as a coin - so it's not just a lack of air that's needed - also it needs to be a large vacuum free from all other forces.

Answer 3

1. Hold on the tip of fingers of different hands a coin and a feather about one meter or more above the floor. Drop both of them simultaneously. The coin will reach the floor before the feather. From this experiment is possible to conclude mistakenly that heavier objects fall faster.

2. Mount the feather on the coin and drop them together. Both object will reach the ground at the same time. The meaning of this experiment is that not the amount of mass causes falling bodies to fall faster or slower but the resistance/friction of air because air resistance is applied here only to the coin and not to the feather and by that we can infer that air resistance and not the amount of mass prevented the feather from falling faster - the same as the coin.

3. Repeat experiments 1 and 2 with different combinations of materials, mass or shape in a vacuum chamber (if you have access to one). All the dropped objects from the same height will fall at the same rate, whatever their mass because there is no air resistance.

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Answer 4

Absolutely--most junior high science teachers have a toy experiment with a penny and a feather in an evacuated tube. They fall together because the gravitational force is proportional to the mass, so the gravitational acceleration is identical. Usually, this fact is masked by the fact that the feather (low mass) is impacted much more strongly by drag from air.

Answer 5

Yes - the link is a video showing David Scott performing the experiment on the moon. The dropped objects don't have to have the same mass and gravity doesn't care about vacuums.

Answer 6

Yes, if there is no air resisitance, a Hammer will fall the same speed as a feather.

Answer 7

Yes! if the coins weight and the feathers weight are identical..... Mass is measured in Newton. and the weight is measured in kg.. g .. Mass becomes weight if you multiply by 9.8 m/s2 (This is the gravitational acceleration).
Air plays some part in falling . And gives some resistant according to the falling objects shape. This is called aero dynamics .
Its the gravity that influence the falling rate.If the are no gravitational acceleration every thing will fall at same rate.

Answer 8

Absolutely yes.

Answer 9

without air resistance there is nothing to slow them down so they fall at the same rate, on earth this would be 9.81(m/s)/s.

Answer 10

Yes

Provide they were not given any momentum by the person, thing that released them,