The total mechanical energy of a system as a function of time is shown in the graph. Which of the following statements is true regarding the system? A
The system should be classified as a closed system because the total mechanical energy lost from t = 3 s tot = 5s was gained from
t = 6 s to t = 9 s.
B
The system should be classified as an open system because mechanical energy can be added and removed from the system.
с
The system should be classified as an open system because the curve in the graph is symmetrical.
D
The system should be classified as a closed system because the system's total mechanical energy does not change from t = 0s to t = 10 s.