Question

Which bar on the graphs demonstrates the Law of Conservation of Energy and why?

a. Bar 1, as it shows potential energy increasing.
b. Bar 2, as it demonstrates kinetic energy conservation.
c. Bar 3, as it depicts energy transformation.
d. Bar 4, as it indicates energy loss.

Answer 1

Bar 3 demonstrates the Law of Conservation of Energy as it shows energy transformation from potential to kinetic while the total energy of the system remains constant.

Step-by-step explanation:

The bar that demonstrates the Law of Conservation of Energy is Bar 3, as it depicts energy transformation. According to this law, energy cannot be created or destroyed but can only be transformed from one form to another. The energy transformation is seen as the potential energy (U) at the highest point of the swing is converted into kinetic energy (K) at the lowest point. Even though the form of energy changes, the total energy (E) of the system remains conserved. Therefore, the total energy at the highest point (potential energy) equals the total energy at the lowest point (kinetic energy), indicating that Bar 3 represents the conservation of energy where kinetic energy is at its maximum and equals the system's total energy.