For dissipative forces (air resistance and friction), so that the jump reaches the highest possible height, that is, the maximum energy is conserve...
For dissipative forces (air resistance and friction), so that the jump reaches the highest possible height, that is, the maximum energy is conserved, it is necessary that
a) the kinetic energy, represented in stage I, is completely converted into elastic potential energy represented in stage IV.
b) the kinetic energy, represented in stage II, is completely converted into gravitational potential energy, represented in stage IV.
c) the kinetic energy, represented in stage I, is completely converted into gravitational potential energy, represented in stage III.
d) the gravitational potential energy, represented in stage II, is completely converted into elastic potential energy, represented in stage IV.
e) the gravitational potential energy, represented in stage I, is completely converted into elastic potential energy, represented in stage III.
a) the kinetic energy, represented in stage I, is completely converted into elastic potential energy represented in stage IV.
b) the kinetic energy, represented in stage II, is completely converted into gravitational potential energy, represented in stage IV.
c) the kinetic energy, represented in stage I, is completely converted into gravitational potential energy, represented in stage III.
d) the gravitational potential energy, represented in stage II, is completely converted into elastic potential energy, represented in stage IV.
e) the gravitational potential energy, represented in stage I, is completely converted into elastic potential energy, represented in stage III.
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Ed 
Para que a energia seja conservada e o salto atinja a altura máxima possível, é necessário que a alternativa correta seja a letra b) a energia cinética, representada na etapa II, seja completamente convertida em energia potencial gravitacional, representada na etapa IV. Isso ocorre porque, quando o corpo atinge a altura máxima, sua velocidade é zero e, portanto, toda a energia cinética é convertida em energia potencial gravitacional.
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