Final answer:
The question relates to high school Physics, focusing on projectile motion, which studies the trajectory of an object launched into the air under gravity's influence. It involves calculating the object's range, height, and time of flight based on its initial velocity both horizontally and vertically.
Step-by-step explanation:
The subject of the question is Physics, specifically dealing with projectile motion. Projectile motion refers to the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The question is from a high school level course as it involves concepts commonly taught in high school physics classes.
The initial velocity (va) of a projectile and the angles at which it is launched are crucial in determining its trajectory and landing point. When projectiles are launched from an elevation, both horizontal and vertical components of their initial velocity affect their flight time and range. The student's question involves calculating details about the projectile's motion, like its range, height, and time of flight, which are all central topics in the study of projectile motion.