if you toss a ball upward is the momentum of the ball conserved?

Question

physics question

Answer 1

Law of consrvation of momentum is valid ONLY WHEN THERE IS NO NET FORCE ACTING ON IT. When a ball is thrown upwards, there is a net force acting on it which is the force due to gravity, i.e., its weight. Hence, its momentum is not conserved. This does not amount to the violation of the law as the condition for the law of conservation of momentum to be valid which is zero net force is not satisfied here.

Answer 2

No the momentum is not conserved , since there is a change in momentum of the ball . this change is due to two forces the gravity and air resistance .


The law of conservation of momentum says the momentum of an isolated sytems remains constant , unless an external force acts .

Answer 3

NO, because theoretically the law of conservation of energy, will state that it the energy in the start of the activity will be the same at the end, but in actual situation there will always be losses, like in your example wind resistance and the state of the ball will certainly be a contributing factor.

Answer 4

Yes.
The explanation is a little counter-intuitive but here goes:
Momentum is velocity times mass.
The momentum of the ball is matched by a sub-microscopic movement of the Earth.
The Earth does not move far but it has a lot of mass.

Answer 5

absolutely, it has to be. The earth is moved downward ever so slightly, but as the ball is attracted back to earth by gravity, the earth moves up ever so slightly. Imagine it with two earth sized balls, and one is pushed away from the other. they will move apart the same amount and come back together.

Answer 6

momentum is always conserved, its the law of conservation of momentum!

Answer 7

Does it REALLY matter ?

Answer 8

.........yes.....