UNIT 3 FORCES

5. A push or pull one object exerts on another. Can cause a change in motion.
7. The tendency of an object to resist a change in motion.
8. The force the surfaces exert to prevent solid objects from passing through each other.
9. Resistance to motion when two objects are in contact with each other.
11. The unit for force.
12. When one object actively exerts a force on another we call it an ____________ force.
14. The amount of matter in an object.
15. When forces cause an object to change its motion in the direction of the force they are considered _______________.
16. An object in motion stays in motion and an object at rest stays at rest unless acted upon by a net force. This is Newton’s _____________ Law.
17. Combining all the forces acting on an object results in a ______ force.
18. The attractive force between two objects. What pulls objects toward Earth.

1. The maximum velocity an object will reach when falling (when gravity and air resistance become balanced) is called _______________ velocity.
2. The force when transmitted through a pulled rope, string, or wire.
3. Resistance to motion an object feels traveling through the air (no space).
4. The force of gravity on an object.
6. When multiple forces acting on an object do not result in a change in motion they are considered _______________ (equal and opposite).
10. The law of conservation tells us that during a collision momentum is ______________ from one object to another.
13. A net force acting on an object will cause it to accelerate in the direction of the net force. This is Newton’s ____________ Law.
14. Mass in motion.
19. For every action there is an equal and opposite reaction. This is Newton’s ___________ Law.