... linear momentum, but not kinetic energy so Pi = Mv0

**Pf**= (M + m)vf --> Pi =**Pf**vf = Mv0/(M + m...1 Answers · Science & Mathematics · 23/02/2021

...any point on the parabola Q(4, y) ... the projection of P onto the directrix

**PF**= PQ**PF**² = PQ² (x + 2)² + (y - 5)² = (x - 4...4 Answers · Science & Mathematics · 22/02/2021