If the forces acting on an object are balanced, the object may change speed, change direction, or do both. true or false.

That's false.  When the forces acting on an object are balanced,
their effect on the object is the same as the effect of no forces at all. 
Then the object continues moving in a straight line at a constant speed.

Generalizations should be revised because they can be confusing because of the number of details.

Explanation:

A Generalization is a kind of conclusion where the writer presents a statement that offers many examples or facts and it also analyzes them so the reader can get to their own conclusions, some words that are commonly used in generalizations are all, none, most, many, always, everyone, never, sometimes, some, usually, seldom, few, generally, in general, and overall.