What causes a metal ball to fall faster than a feather on earth?

In summary: The feather will touch the ground before the brick.In summary, the feather experiences greater force of air friction because it is smaller.
  • #1
art14
2
0
If you drop a metal ball and a feather at the same time the ball will touch the ground before the feather, why is this? What effect is the Earth's atmosphere having on the feather? If you dropped a piece of metal in the shape of a feather it still would touch the ground before the feather and if you dropped a piece of metal that weighted the same as a feather the piece of metal would still touch the ground before the feather so what is it? could it be density?
 
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  • #2
All of the above.

If you dropped a piece of metal that had the same shape and size and weight as a feather, they would fall a the same rate.
 
  • #3
feather drops slower because of air resistance too
 
  • #4
DaveC426913 said:
All of the above.

If you dropped a piece of metal that had the same shape and size and weight as a feather, they would fall a the same rate.

If a metal had the same size and weight as a feather then it would have to be significantly less dense than any other metal right, so is it density.
I guess its due to the air resistance but as I said if a metal had the same shape as a feather it would still fall faster so why isn't it affected by air resistance(weight), so its probably a conbination of factors.
 
  • #5
Thread moved from general technical forums to Homework Help forums.

Art, welcome to the PF. Please be sure to post homework and coursework questions like this one in the Homework Help forums here on the PF.

Now to your question -- what effect will the density of an object (given the same wind-resistance shape) have on the maximum velocity that the object can obtain? Use a bicycle with different weight riders going down a hill if you need...
 
  • #6
art14 said:
I guess its due to the air resistance but as I said if a metal had the same shape as a feather it would still fall faster so why isn't it affected by air resistance(weight), so its probably a conbination of factors.
It is. A metal feather experiences exactly the same force due to air resistance as a real feather. And since acceleration due to force is inversely proportional to mass...
 
  • #7
Hurkyl said:
It is. A metal feather experiences exactly the same force due to air resistance as a real feather. And since acceleration due to force is inversely proportional to mass...


So if the question was "A brick and a feather fall to Earth at their respective terminal velocities. Which object experiences greater force of air friction?"


does it depend on their actual size? if you had a feather from a sparrow and a regular sized brick is the brick experiences greater force of air friction because it's larger and has to push through more air than the feather? and the brick falls faster because it's mass is so much greater.

if the feather was from some massive bird and was much larger than the brick, would the feather then be experiencing greater force of air friction then the brick, but probably still be falling slower? assuming the mass of the brick was still greater than the feather.

- Otis
 

1. Why does a metal ball fall faster than a feather on earth?

This is due to the force of gravity acting on both objects. The force of gravity is determined by the mass of an object, with the more massive object experiencing a greater force. Since the metal ball is more massive than the feather, it experiences a greater force of gravity and therefore falls faster.

2. Does the shape of the objects affect their falling speed?

Yes, the shape of an object can affect its falling speed. Objects with a larger surface area, like a feather, experience more air resistance and therefore fall slower than objects with a smaller surface area, like a metal ball.

3. Is the material of the objects a factor in their falling speed?

Yes, the material of an object can affect its falling speed. Objects with a higher density, like a metal ball, will fall faster than objects with a lower density, like a feather.

4. What role does air resistance play in the falling speed of objects?

Air resistance plays a significant role in the falling speed of objects. The larger the surface area of an object, the more air resistance it will experience, slowing down its fall. This is why objects with a smaller surface area, like a metal ball, will fall faster than objects with a larger surface area, like a feather.

5. Would a metal ball and a feather fall at the same speed in a vacuum?

Yes, in a vacuum where there is no air resistance, a metal ball and a feather would fall at the same speed. This is because the force of gravity is the only force acting on the objects, and it is determined solely by the mass of the objects.

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