Which of these statements best reflects the meaning of "conservation of energy" as it is used in dynamics?
Answers
answer 1 You should turn off the lights when you leave the office at 5 pm.
answer 2 The total energy, which is the sum of kinetic and potential energy, is always the same.
answer 3 Energy can be stored in a jar.
answer 4 If conditions are right, then the total energy (sum of potential and kinetic) is constant.