Breaking the Law of Conservation of Energy

In summary: Kinetic energy is the energy of motion. When the ball bounces back up it has less kinetic energy and also less gravitational potential energy. So the ball doesn't reach the same height it was dropped from. This is because the kinetic energy is always decreasing while the other two energies are not. When a ball is dropped, the kinetic energy is the maximum when it is at the bottom of the fall. After the ball has bounced up a few times, the kinetic energy has decreased so much that it is lower than when it was dropped. The ball also has less gravitational potential energy because the earth's gravity is pulling it down. So the ball doesn't reach the same height it was dropped from because it has less kinetic energy and also
  • #1
Skizor1337
4
0
When a basketball is dropped then bounces up it reaches 0 kinetic energy, but it doesn't reach original height it was dropped from. Why does this not violate the Law of Conservation of Energy?
 
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  • #2
Skizor1337 said:
When a basketball is dropped then bounces up it reaches 0 kinetic energy, but it doesn't reach original height it was dropped from. Why does this not violate the Law of Conservation of Energy?

What are your thoughts? We need you to attempt to answer the question before we can offer tutorial help (them's the Rules -- see the link at the top of the page).

It's a fun problem -- that do you think is going on?
 
  • #3
I think its because when the ball bounces back up since it has elastic potential energy. But it doesn't reach the same height it was dropped from because it loses kinetic energy and also gravitational potential.
 
  • #4
Skizor1337 said:
I think its because when the ball bounces back up since it has elastic potential energy. But it doesn't reach the same height it was dropped from because it loses kinetic energy and also gravitational potential.

Um, no. What different forms of energy are involved in the ball drop and bounce. Think of other forms beyond simple PE and KE...
 
  • #5
the only other i can think of is thermal but that's on a very small scale. And its not rotational even though it is a ball. I'm kinda stuck on this question
 
  • #6
Skizor1337 said:
the only other i can think of is thermal but that's on a very small scale. And its not rotational even though it is a ball. I'm kinda stuck on this question

Yes there is some thermal energy change involved? What all heats up from the motion and bouncing? What else would be different if you were bouncing the ball in a vacuum?
 
  • #7
Im only in Physics not AP. i haven't gotten into depth about things like that. were only in basic. But the teacher said thermal was not a huge factor
 
  • #8
Do you hear when the ball hits the ground? :)

ehild
 
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Related to Breaking the Law of Conservation of Energy

1. How is it possible to break the Law of Conservation of Energy?

Breaking the Law of Conservation of Energy is not possible in the traditional sense. The law states that energy can neither be created nor destroyed, only transformed from one form to another. Therefore, it is not possible to break this law, but rather, it can be circumvented or violated through specific circumstances or phenomena.

2. Can the Law of Conservation of Energy be broken in everyday life?

In everyday life, the Law of Conservation of Energy is always followed. Energy is constantly being transformed and transferred from one form to another. However, there are some rare and extreme cases, such as in nuclear reactions, where a small amount of matter can be converted into a large amount of energy, violating the traditional concept of conservation.

3. How does the Law of Conservation of Energy apply to the universe?

The Law of Conservation of Energy applies to the universe as a whole, meaning that the total amount of energy in the universe remains constant. This includes all forms of energy, such as kinetic, potential, thermal, and nuclear. Even in the event of the Big Bang, the total energy in the universe is believed to have remained constant.

4. Can breaking the Law of Conservation of Energy lead to perpetual motion?

No, breaking the Law of Conservation of Energy does not lead to perpetual motion. Perpetual motion, or the idea of a machine that can continuously operate without an external energy source, is impossible according to the law. Any apparent violation of the law is due to a misunderstanding of the system or a lack of understanding of all the energy sources involved.

5. What are some examples of phenomena that seemingly violate the Law of Conservation of Energy?

There are several phenomena that may seem to violate the Law of Conservation of Energy, such as the production of energy from nothing in quantum mechanics or the apparent loss of energy in a black hole. However, these phenomena can be explained by taking into account all forms of energy involved and adhering to the principle that energy cannot be created or destroyed, only transformed.

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