Question

which of these interactions store potential energy? choose 2 answers: a the electric interaction between the balloon and the wall b the gravitational interaction between the balloon and the earth c the normal interaction between the balloon and the wall d the frictional interaction between the balloon and the wall

Explanation:

Potential energy is stored in systems due to position or configuration. Electric potential energy exists in the electric - interaction system (as charged objects can do work when allowed to move). Gravitational potential energy exists in the gravitational - interaction system (an object can fall and do work). The normal and frictional interactions do not store potential energy as they are contact forces that do not have a stored - energy aspect related to position in the same way.

Answer:

A. the electric interaction between the balloon and the wall
B. the gravitational interaction between the balloon and the Earth