Question

question 18 of 25 for an isolated system, the sum of the kinetic and potential energies. a. increases gradually over time. b. always remains the same. c. decreases gradually over time. d. gradually changes up and down over time.

Explanation:

In an isolated system, the total mechanical energy (sum of kinetic and potential energies) is conserved, meaning it remains constant over time according to the law of conservation of energy.

Answer:

B. always remains the same.