Sandy puts a paper clip on the table. then, she puts a magnet near the paperclip. the paperclip begins to move. the paperclip has forces acting on it. a. only magnetic b. only gravitational c. balanced d. unbalanced

Explanation:

Unbalanced forces are those which occasionate changes in the object, like moving for example. The term "unbalanced" refers to the lack of equilibrium in the system, that is, the net force is not equal to zero, that's why the object moves. When we have a system where the net force is zero, that means the object in the system won't move, because all forces cancel each other.

So, in this case, when Sandy puts the paper clip on the table, initially, it's in equilibrium, the system is balanced. But, when she puts a magnet near the paperclip, the system becomes unbalanced, because the net force isn't zero anymore, having as a result a movement of the object.

Therefore, the word that completes the statement is D. unbalanced.

Sandy puts a paper clip on the table. Then, she puts a magnet near the paperclip. The paperclip begins to move. The paperclip has unbalanced forces acting on it.

conservation of mass

mass before something happens = mass afterwards