8. A launcher shoots a ball horizontally from a height of 1.5 m. The ball lands 8.2 m away from the base of the launcher. (8.2 m is the horizontal displacement.) [Ignore air resistance.] a) How fast is the ball launched from launcher? b) If the ball is then fired straight up at the same speed, how high will it go? [Give me the height from the point at which the ball leaves the launcher.] 9. A planet with a mass of half of Earth's mass and twice Earth's radius would have an escape speed of what?