an object is seen to either speed up, slow down, or change direction. these behaviors are caused by what ?

A. frictional force
B. stable factors
C. a balanced set of forces
D. unbalanced forces

Answer :

I believe the correct answer from the choices listed above is option D. An object is seen to either speed up, slow down, or change direction due to unbalanced forces. When a system is subjected to unbalanced forces, the object would tend to move or change in motion. Hope this answers the question.

The correct answer is unbalanced forces

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