stretchable cord mean for a jumping right is being tested weight of 800 N is attached to one end of the cord then the way is released from a tall tower and then moves downward when the cord is fully stretch it exerts an opposing force of 900 N on the weight

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.

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the answer would be   dignified - apex

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

the closer the planet is to the sun, the larger the gravity