yankeefrankie74421 yankeefrankie74421 21-02-2024 Physics contestada A rock is launched over a level ground with an initial velocity of 15.0 m/s at an angle of 20 degrees above the horizontal. What is the projectile's time of flight? a. 3.07 s b. 4.55 s c. 2.30 s d. 5.21 s