Recent content by rick2395

i get that. What changes do i have to make in writing the equation(momentum equations) if i take into consideration the Earth as well??

Basically as far i am concerned MOMENTUM CAN BE CONSERVED ALONG A DIRECTION WHERE NO NET EXTERNAL FORCE IS ACTING but in the example of the two projectiles force mg of both the particles acts downwards and there is no force to balance them(Unlike if they would have been place on a surface...

There is a line written in my physics textbook it says " For any type of collision momentum can be conserved before and after the collision about the line of collision and and about the line perpendicular to the line of collision" . Well i got a question here can we always conserve momentum...