Here's why:

* Balanced forces mean that the forces acting on an object are equal in magnitude and opposite in direction.

* Newton's First Law of Motion states that an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction *unless acted upon by an unbalanced force*.

Therefore, if the forces are balanced, the object will not change its speed or direction.

Let me know if you have any other questions!