Forces

3. A push or pull
5. the fluid friction experienced by objects falling through the air
6. opposes the motion of an object through a fluid
7. the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
10. A force of attraction between objects that is due to their masses
11. the powerful attractive force that binds protons and neutrons together in the nucleus
13. a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram
14. the force that opposes the motion of one surface as it moves across another surface
16. the attractive or repulsive force between electric charges and magnets
17. the combination of all forces acting on an object
18. friction that occurs when one solid surface slides over another
19. friction that acts on objects that are not moving

1. Force = mass x acceleration
2. the scientific law that states that every object in the universe attracts every other object by mass and distance
4. the scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force
8. "If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object."
9. the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth
12. a powerful attractive force that acts over a short range, responsible for radioactive decay
15. friction that occurs when an object rolls over a surface