Two projectiles are launched from two different heights, as shown in the figure. Projectile A, on the left, is launched from a 30 m building, with an initial speed of 50 m/s in a horizontal direction. Projectile B, at right, it is launched from a building 100 m from the other building and from a height of 15 m. It is also known that the Projectile B is launched at an angle of 135° with respect to the horizontal, with unknown initial velocity. Find: a) The initial velocity with which projectile B is launched. b) The time elapsed from when the projectiles are launched to when they crash into each other. 30m √(4) 100m 2-18) 15m 135°

Two projectiles are launched from two different heights, as shown in the figure. Projectile A, on the left, is launched from a 30 m building, with an initial speed of 50 m/s in a horizontal direction. Projectile B, at right, it is launched from a building 100 m from the other building and from a height of 15 m. It is also known that the Projectile B is launched at an angle of 135° with respect to the horizontal, with unknown initial velocity. Find: a) The initial velocity with which projectile B is launched. b) The time elapsed from when the projectiles are launched to when they crash into each other. 30m √(4) 100m 2-18) 15m 135°