Tres cargas puntuales se ubican sobre el eje x: q1=5uc en x=0, q2 =3 uc en x=0.3m y q3=7uc en x=0.6m a) ¿cuál es la fuerza sobre la (q2)? : b) ¿ cuál es la fuerza sobre la carga (q3)?

where is the

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.