AAAS Science Assessment ^beta

A school bus is slowing down as it comes to a stop sign.

Which of the following statements is TRUE about the forces acting on the school bus while it is slowing down but still moving forward?

1. As long as the school bus is still moving forward, the forward force of the school bus has not run out.
2. As long as the school bus is still moving forward, any forces moving it forward would have to be stronger than any forces slowing it down.
3. If the school bus is slowing down, any forces moving it forward would have to be weaker than any forces slowing it down.
4. If the school bus is slowing down, any forces moving it forward would have to be the same strength as any forces slowing it down.