How much force is required to lift a rock a vertical distance of 8 m if "90" J of work were done

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 -

c) power lifting, will be your answer.

,

deku ❤