En un juego de billar una bola de 500g se mueve con velocidad de 2 m/s chocando con la mesa y devolviendose con una velocidad igual.
si el movimiento inicial se dio hacia la izquierda y el choque se prolonge en sentido contrario. calcule:
movimiento antes y después del choque y el impulso por la bola

Why does the input force have to be greater than the force needed to lift the bale?

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.