A 2.0 kg body falls in free fall, from rest, from a point located 5.0 m from the ground. Consider g = 10 m/s². In relation to the body's mechanical energy, we can state that:
I. increases during the entire fall of the body, as the kinetic and potential energies increase;
II. is equal to the sum of the kinetic and gravitational potential energies at any point on the trajectory;
III. at the beginning of the fall is worth 100 J.
Check the correct alternative.
A) Only I is correct.
B) Only I and II are correct.
C) Only I and III are correct.
D) Only II and III are correct.
E) Only III is correct.