THIS USER ASKED 👇
As the projectile goes upward, what energy changes take place? a. both kinetic and potential energy decrease. b. both kinetic and potential energy increase. c. kinetic energy decreases; potential energy increases. d. kinetic energy increases; potential energy decreases.
THIS IS THE BEST ANSWER 👇
C. Reduces kinetic energy; potential energy increases.
At the beginning the projector has a high kinetic energy because we assume that it starts from zero speed and when it rises it needs great acceleration and velocity and therefore the kinetic energy increases. When it reaches a certain height the projectile begins to decrease its speed (with the same force of gravity) and its kinetic energy begins to decrease to convert itself into potential energy. It is transformed into potential energy since after the projectile reaches its maximum point it becomes a fall-free projector accelerated by the force of gravity, where the potential energy begins to change to kinetic energy here.