You do work on a body when you lift it against gravity. how does this work relate to gravitational potential energy? if the lifted body is dropped, what becomes of this energy?

Ineed the answer to question 1 , i’m desperate

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.