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When a ball is thrown up the magnitude of its momentum decreases and then increases.Does this violate the conservation of momentum principle?
No, this does not violate the conservation of momentum principle. As the ball is thrown up, its vertical velocity decreases, causing a decrease in momentum in that direction. However, the overall momentum of the ball (including horizontal and vertical components) remains constant in the absence of external forces. When the ball reaches its highest point and falls back down, its vertical velocity increases again, conserving the total momentum of the system.
If you topple from your treehouse you'll continuously gain momentum as you fall to the ground below doesn' t this violate the law of conservation of momentum?
"Momentum is conserved if no net external force acts.If you consider just the falling object (you that is), there is an external force acting on it - gravity. So there is no violation of conservation of momentum here.On the other hand, if you consider the falling you and the earth as two interacting objects, then there is no net external force, just the internal gravitational forces acting between you and the earth. So you and the earth gain equal but opposite amounts of momentum, and momentum is conserved."http://intranet.emmawillard.org/Science/physicscqanswers.html
When a ball rolls down a hill and gains momentum is the law of momentum conservation violated?
No it is not! The hill is moving in the opposite direction. You do not perceive the motion of the hill since it move sooo slowly... When the ball will stop with respect to the hill (for instance because of an obstacle rigidly connected to the hill) then the hill will stop too. And the potential energy of the ball will be transformed into heat and sound.
Does an electron-positron collision violate the law of conservation of matter?
No, electron-positron collision does not violate the law of the conservation of matter. Momentum and charge are also conserved. Electrons and positrons can collide in what are called scattering events, and they can do this without necessarily undergoing mutual annihilation. Because both these little critters can exist as a wave (particle-wave duality), their behavior can be fairly easily assessed using a "basic tool kit" to analyze electromagnetic wave interaction. But electrons and positrons can annihilate each other rather than scatter. Annihilation doesn't violate the law of conservation of matter, either. And there's a reason for that. The "old" idea of the conservation of matter was that matter could neither be created nor destroyed. But we now know that matter can be converted into energy. That's what happens in annihilation. The article in Wikipedia on the annihilation event touches on electron-positron collision. And there is an article on electromagnetic scattering as well. They aren't that difficult to understand, and the curious person will find links to those posts below.
Why can a moving object cannot come to a stop instantaneously (in zero seconds)?
A moving object cannot come to a stop instantaneously because it would violate the laws of physics, particularly the conservation of momentum. In order for an object to stop, its momentum must be transferred to another object or system, which takes time based on the forces involved.
When a ball is thrown up the magnitude of its momentum decreases and then increases.Does this violate the conservation of momentum principle?
No, this does not violate the conservation of momentum principle. As the ball is thrown up, its vertical velocity decreases, causing a decrease in momentum in that direction. However, the overall momentum of the ball (including horizontal and vertical components) remains constant in the absence of external forces. When the ball reaches its highest point and falls back down, its vertical velocity increases again, conserving the total momentum of the system.
Does conservation of angular momentum disprove the big bang?
No, This assumes that the universe is a closed system, while this seems a reasonable hypothesis, the modern big bang theory actually states outright that the universe is not a closed system. Conservation of energy is also violated in the current model, the total energy of the universe is increasing.
If you topple from your treehouse you'll continuously gain momentum as you fall to the ground below doesn' t this violate the law of conservation of momentum?
"Momentum is conserved if no net external force acts.If you consider just the falling object (you that is), there is an external force acting on it - gravity. So there is no violation of conservation of momentum here.On the other hand, if you consider the falling you and the earth as two interacting objects, then there is no net external force, just the internal gravitational forces acting between you and the earth. So you and the earth gain equal but opposite amounts of momentum, and momentum is conserved."http://intranet.emmawillard.org/Science/physicscqanswers.html
Does a ball falling to earth violate conservation of momentum?
No. As a ball accelerates toward the Earth, the Earth is also accelerating to the ball. The Earth's acceleration is much too small to be detectable. But multiplied by the Earth's large mass, it is equal and opposite to the increase in the ball's momentum.
When a ball rolls down a hill and gains momentum is the law of momentum conservation violated?
No it is not! The hill is moving in the opposite direction. You do not perceive the motion of the hill since it move sooo slowly... When the ball will stop with respect to the hill (for instance because of an obstacle rigidly connected to the hill) then the hill will stop too. And the potential energy of the ball will be transformed into heat and sound.
Does an electron-positron collision violate the law of conservation of matter?
No, electron-positron collision does not violate the law of the conservation of matter. Momentum and charge are also conserved. Electrons and positrons can collide in what are called scattering events, and they can do this without necessarily undergoing mutual annihilation. Because both these little critters can exist as a wave (particle-wave duality), their behavior can be fairly easily assessed using a "basic tool kit" to analyze electromagnetic wave interaction. But electrons and positrons can annihilate each other rather than scatter. Annihilation doesn't violate the law of conservation of matter, either. And there's a reason for that. The "old" idea of the conservation of matter was that matter could neither be created nor destroyed. But we now know that matter can be converted into energy. That's what happens in annihilation. The article in Wikipedia on the annihilation event touches on electron-positron collision. And there is an article on electromagnetic scattering as well. They aren't that difficult to understand, and the curious person will find links to those posts below.
Why cant there be a perpetual machine?
It isn't entirely clear what you mean with "perpetual machine". If you mean the old dream of the "perpetuum mobile", such a machine would violate the Law of Conservation of Energy; there are various reasons to assume that this law can't be violated:* Despite lots of attempts, by thousands of ingenious inventors, and over centuries, nobody has managed to violate Conservation of Energy so far. * Violating Conservation of Energy would also violate lots of other laws of physics, which are generally considered to be true. For example, Conservation of Mass, and Conservation of Momentum. * By Nöther's Theorem, the possibility that the amount of energy changes over time would be equivalent to the laws of physics changing over time! - Nowadays, the Law of Conservation of Energy is normally derived from Nöther's Theorem.
Why can a moving object cannot come to a stop instantaneously (in zero seconds)?
A moving object cannot come to a stop instantaneously because it would violate the laws of physics, particularly the conservation of momentum. In order for an object to stop, its momentum must be transferred to another object or system, which takes time based on the forces involved.
Does rusting violate the law of conservation of mass?
no Nothing violates that law.
Does Rust violate the law of conservation of mass rust?
no Nothing violates that law.
A truck travelling 60 kmh is brought to a complete stop at a traffic lightDoes this change in velocity violate the law of conservation of energy?
no it does not violate the law of conservation of energy as energy is not lost/destroyed but transferred to the brakes of the truck.
Can earths revolution generate electricity?
Well, not directly, since there is nothing "against" which Earth is rotating; nothing where you can hold on to, to slow Earth down. Of course you can't get energy without slowing Earth down, since that would violate Conservation of Energy. And just slowing down Earth by itself, without affecting other objects in the Universe, would violate Conservation of Rotational Momentum. However, the tidal energy is indirectly a result of Earth's revolution.
