The backpack sitting on the floor will suddenly fly forward when the bus is going forward and suddenly stops.
According to Newton's first law, an object will remain in its state of rest or uniform motion unless it is acted upon by external, unbalanced forces. This is also called the law of inertia.
The backpack sitting on the floor will obey this law as long as the bus in motion. However, if the bus is going forward and suddenly stops, the backpack sitting on the floor of the school bus will fly forward.
Learn more about Newton's laws: https://brainly.com/question/13678295
