Force

Nota:

• A push or pull

1. Newton

   Nota:

   • The strength of force is measured in the SI unit called newtons. 
2. Net Force

   Nota:

   • The combination of all forces acting on an object
   1. Balanced Forces

      Nota:

      • Equal forces acting on one object in opposite directions.
   2. Unbalanced Forces

      Nota:

      • Can cause an object to start moving, stop moving, or change direction. 
      1. Free Fall

         Nota:

         • When the only force acting on an object is gravity. 
3. Friction

   Nota:

   • The force that two surfaces exert on each other when they rub against each other. 
   1. Static Friction

      Nota:

      • The friction that acts on objects that are not moving.
   2. Sliding Friction

      Nota:

      • Occurs when two solid surfaces slid over each other.
   3. Rolling Friction

      Nota:

      • When an object rolls across a surface. 
   4. Fluid Friction

      Nota:

      • When a solid object moves through a fluid. 
      1. Air Resistance

         Nota:

         • Objects falling through air experience a type of fluid friction. 
         1. Terminal Velocity

            Nota:

            • The greatest velocity of a falling object reaches. 
4. Gravity

   Nota:

   • Is a force that pulls objects toward each other. 
   1. Mass

      Nota:

      • Is a measure of the amount of matter in an object. The more mass an object has, the greater its gravitational force. 
      1. Weight

         Nota:

         • The force of gravity on a person or object at the surface of a planet. Weight is a measure of the gravitational force exerted on an object. 
   2. Universal Gravity

      Nota:

      • States that the force of gravity acts between all objects in the universe. This means that any two objects in the universe, without exception, attract each other. 
   3. Factors Affecting Gravity

      Nota:

      • Two factors affect the gravitational attraction between objects: mass and distance. The gravitational force depends on the distance between the objects.  
5. Projectile

   Nota:

   • An object that is thrown. 
6. Inertia

   Nota:

   • Is the tendency of an object to resist a change in motion. 
7. Momentum

   Nota:

   • Is a characteristic of a moving object that is related to the mass and the velocity of the object. 
   1. Law Of Conversation Of Momentum

      Nota:

      • States that in the absence of outside forces, the total momentum of objects that interact does not change.