Question

the potential energy of a freely falling object decrease progressively does this violent the law of conservation of energy why

Answer 1

no it does not violate the law of conservation of energy
as the body is falling it's potential energy decreased is due to decrease in height
but due to this decreased height, the kinetic energy increases due to increase in velocity under the effect of earth's gravity
so the net change in the mechanical energy is 0

Answer 2

No, the rapid decrease of P.E will not violate the law of conservation of energy because kinetic energy increase due to the increase of velocity. Hence the total sum of P.E and K.E remain constant and obeyed the law of conservation of energy.