17.You launch a projectile at an initial speed of 45.8m/s from the ground. After 3.30 seconds of flight, the projectilelands on the ground. At what angle above the horizontal was theprojectile launched?
| | 15.6 degrees |
| | 20.7 degrees |
| | 31.1 degrees |
| | 11.5 degrees |
18.A projectile is fired from the ground, reaches amaximum height of 56.4 m and lands a distance of 39.0 m away fromthe launch point. What was the projectile s launchvelocity?
| | 33.3 m/s, 40.1 degrees above horizontal |
| | 5.8 m/s, 48.1 degrees above horizontal |
| | 57.5 m/s, 24.1 degrees above horizontal |
| | 33.8 m/s, 80.2 degrees above horizontal |
