When a body falls to the earth, the earth also move up to meet it but the earth motion is not noticeable. why?

Drag each item into the proper state of matter category.

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?