In the listed cases, the events in which elastic bodies occur are described. For each event, determine whether the body’s elastic energy increases, decreases, or does not change.
A ball rolling on the floor.
A balloon inflated by a child.
A taut bowstring that an archer lowers and shoots an arrow.
A bed grandma sits on.
An elastic band that falls from the table to the floor.
A spring balance on which the teacher hangs a weight.
A compressed spring that a student lowers to fly off the table.
