the total energy in a system is 675 j. the kinetic energy changes from 296 j to 432 j. which statement best…
the total energy in a system is 675 j. the kinetic energy changes from 296 j to 432 j. which statement best describes the potential energy of this system? it changes from 296 j to 432 j. it changes from 379 j to 243 j. it changes from 432 j to 296 j. it changes from 243 j to 379 j.
Answer
Explanation:
Step1: Calculate initial potential energy
The total energy $E$ is the sum of kinetic energy $K$ and potential energy $U$, i.e., $E = K+U$. Initially, $K_1 = 296\ J$ and $E=675\ J$. So, $U_1=E - K_1=675 - 296=379\ J$.
Step2: Calculate final potential energy
Finally, $K_2 = 432\ J$ and $E = 675\ J$. So, $U_2=E - K_2=675 - 432=243\ J$.
Answer:
It changes from 379 J to 243 J.