3. se tira una piedra verticalmente hacia abajo con una velocidad inicial cuya magnitud es de 8 m/s. calcular: a) ? qué magnitud de velocidad llevará a los 4 segundos de su caída? b) ? qué distancia recorre en ese tiempo?

answer: i don't know the answer good luck

explanation:

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

the device is called “ rocket engine”