global warming definition. The term attached to the notion that the Earth's temperature is increasing due to the greenhouse effect. Note: Whether global warming is actually happening is a subject of scientific debate.
Like jet airplanes, space rockets work on a principle called action and reaction (another name for Newton's third law of motion). The massive force (action) generated by hot gases firing backward from a rocket's engines produces an equal force (reaction) that pushes the rocket forward through space.
When the bus moves forward, it pushes the passengers forward, as they were not previously moving. The feeling would be that you were falling backward as the passenger was previously stationary. That stationary spot is now behind you as you move forward, so the force that is felt would be in that direction.