Answer #5: 1 st : Inertia; an object at rest will stay at rest or an object in motion will stay in motion unless acted on by an outside force. 2 nd : F=ma; to move a mass you need a force. The bigger the mass is the more force force one needs to apply. 3 rd : Action/Reaction; for every action there is an equal, but opposite reaction.
Question #6: What is the difference between speed and velocity?
Answer #6: Both speed and velocity are rates of distance per unit of time, however, velocity also indicates a direction.