Conservation of momentum means: initial momentum = final momentum

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Presentation transcript:

Conservation of momentum means: initial momentum = final momentum m1v1i + m2v2i = m1v1f + m2v2f If neither object is moving initially, then initial momentum = 0. Ex: astronaut throwing oxygen tank Objects collide and remain separate after the collision. Ex: a moving billiard ball collides with a stationary . B. equation simplifies to A. equation simplifies to m1v1i = m1v1f + m2v2f 0= m1v1f + m2v2f If a moving object collides with a stationary one and they move as one. Ex: a brick is dropped into a moving wagon. Two moving objects collide and move as one. Ex: two football players collide and move as one. C. equation simplifies to D. equation simplifies to m1v1i = (m1 + m2)vf m1v1i + m2v2i = (m1 + m2 )vf

Conservation of momentum means: initial momentum = final momentum m1v1i + m2v2i = m1v1f + m2v2f If neither object is moving initially, then initial momentum = 0. Ex: astronaut throwing oxygen tank One object moving initially. Objects collide and remain separate. Ex: a moving billiard ball collides with a stationary ball . B. equation simplifies to A. equation simplifies to If a moving object collides with a stationary one and they move as one. Ex: a brick is dropped into a moving wagon. Two moving objects collide and move as one. Ex: two football players collide and move as one. C. equation simplifies to D. equation simplifies to