answer: the potential energy decreases from 379 j to 243 j
explanation:
for the law of conservation of energy, the total energy in a system must be conserved. the total energy of the system is given by the sum of kinetic (k) and potential (u) energy:
e = k + u
the total energy is e=675 j, and this does not change.
initially, the kinetic energy is k=296 j, so the potential energy is
at the end, the kinetic energy is k=432 j, so the potential energy is
so, we see that the potential energy has decreased from 379 j to 243 j.