se lanza hacia arriba un objeto que alcanza 40 m de altura. calcula el tiempo que tarda y la velocidad con la que se lanzo

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement