when a ball is throw up,the magnitude of its momentum first decreases, then increases.dose this violate conservation of momentum principle?
1i the above case can momentum be conserved or not justify ur answer
should i explain more or is this enough
106What is the conservation of momentum principle?
If NO external force acts on a system or body, then the momentum remains constant (or conserved).
Here an EXTERNAL FORCE does act on the ball.. (THE WEIGHT) SO the momentum will NOT be conserved
If you take the system as the EARTH+BALL... Then the momentum of the EARTH+BALL WILL remain conserved as no external force acts on this system
1hey asish doesn't conservation of momentum say momentum is conserver when no external impulse is acting on the body in that case wieght will be a small value to creat an impluse so no external impluse so momentum is conserver.
but i know i am making a mistake this was my explanation by according to the book i am wrong i don't know were i am making my mistake
guys pls help
106You are talking about impulse..?
What has impulse got to do with this?
Anyways Conservation of Momentum is that "Unless there is any net external force on a system or a body, then the momentum of the system or the body remains constant"
What you are doing is confusing impulses here. The thing u r talking abt is applicable ONLY for collisions where the impulse is large enough to neglect the effect of that external force of gravity. But strictly speaking the result obtained when you do that is not fully correct.
1oh i see we will have to consider impulse only in collision ok get it now thnx for ur help guys
i will read my basics once again may be i am not good enough in my basics yet
