• as it sits on top of a building that is 50 meters tall. • as it is half-way through a fall off a building that is 50 meters tall and traveling 19.8 meters per second.
• as it is just about to hit the ground from a fall off a building that is 50 meters tall and traveling 28 m/s

1. What is the potential energy of the weighted ball as it sits on top of the building?

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

Idon't know hope someone you

Muscle fiber i think that i right