If an object is not accelerating what can you determine about the sum of all the forces on the object?

Ah hah!

Newton's second law of motion:

Net force = (mass) x (acceleration)

If the object's acceleration is zero, then the right side

of that formula is zero.

If the right side is zero, then the left side is also zero.

That means the net force on the object ... the sum of

all forces that may be acting on it ... is zero. The whole

bunch of um have the same effect on the object as if

there were no forces at all.