Question

two or more forces combined is a dash

Answer 1

cause its speed to increase from zero to some value.

But what happens when objects have more than one force on them?

If you push an object to the right with a force of 6 newtons, and someone else pushes to the left with a force of 6 newtons, the object won't accelerate. The two forces cancel each other out.

Thus, you can see that what matters is the total force. So, how do you figure out the total force on an object?