Distance versus Time Graph of distance versus time with distance on the y axis from 0 to 15 meters and time on the x axis from 0 to 20 seconds. There is a straight line from 0, 0 to 20, 8.75. There is a point A located at 7.5, 2.5. The point A on the above graph is an example of interpolation variation extrapolation average method

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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.