Water falling out of an upturned bottle.

In summary, the question asks about the rate of acceleration of water pouring out of a bottle turned at a 90° angle. The options are less than g, equal to g, or more than g. The answer is B, equal to g, as seen in a video demonstration. The acceleration of the water pouring out should be zero unless a propellant is used. The characteristics of water may vary in different locations, but gravity will always be constant.
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Homework Statement


A bottle is filled with water and turned over so it is 90° to the horizontal, the cap is then removed and the water will pour out.

At what rate will the water accelerate? (Ignore friction with air)
A. Less than g
B. equal to g
C. more than g


Homework Equations





The Attempt at a Solution



I think it should be C as the water is being forced out of a smaller opening so it should have some acceleration caused by the pressure and therefore it will be greater than g?

The answer is B in the back of the test paper?
 
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  • #3
the fall of any matter connot exceed G unless you use a propelant. The bottle empties of water at the standard rate and unless its magic it fills with air. so here's the trick where are you conducting the experiment...I ask this because waters Characteristics change dramaticly in different locations...gravity will always be constant regarding the mass that's falling!
 
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FAQ: Water falling out of an upturned bottle.

Why does water fall out of an upturned bottle?

Water falls out of an upturned bottle due to gravity. Gravity is a force that pulls objects towards the center of the Earth, and when the bottle is upturned, the water inside is pulled towards the ground.

Does the shape of the bottle affect the flow of water when it is upturned?

Yes, the shape of the bottle can affect the flow of water when it is upturned. For example, a bottle with a narrower opening will create a more focused stream of water compared to a bottle with a wider opening.

Why does the water flow out of the bottle in a steady stream?

The water flows out of the bottle in a steady stream due to the principle of Bernoulli's equation. This principle states that as the velocity of a fluid increases, its pressure decreases. In the case of an upturned bottle, the water has a high velocity as it is falling, causing a decrease in pressure and resulting in a steady stream.

What factors can affect the rate of water flow when a bottle is upturned?

The rate of water flow when a bottle is upturned can be affected by various factors such as the size and shape of the bottle, the viscosity of the liquid, and the height from which the bottle is upturned. These factors can impact the speed at which the water falls out of the bottle.

Is it possible for the water to flow upwards when a bottle is upturned?

No, it is not possible for the water to flow upwards when a bottle is upturned. This is because the force of gravity is acting on the water, pulling it towards the ground. In order for the water to flow upwards, there would need to be a force greater than the force of gravity acting on the water.

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