013 10.0 points A ball is thrown straight upward and returns to the thrower's hand after 2.1 s in the air. A second ball is thrown at an angle of 41" with the horizontal. At what speed must the second ball be thrown so that it reaches the same maximum height as the first? The acceleration of gravity is 9.8 m/s . Answer in units of m/s.014 (part 1 of 2) 10.0 points Before coming to Earth, your teacher was on planet Krypton where there was almost no atmosphere and where the acceleration of gravity was 5.7 m/s. Your teacher observed and plotted the position of a projectile, asshown in the figure. Projectile Position on Planet Krypton 100 90 * * * X X Vertical Distance (m) 10 X 0+ 0 2 3 4 5 6 7 8 9 10 Horizontal Distance (m) Calculate the time interval between obser vations. Answer in units of s. Your answer must be within + 3.0% 015 (part 2 of 2) 10.0 points Calculate the horizontal speed of the project tile. Answer in units of m/s. Your answer must be within + 3.0%