physics

newton’s second law of motion

1. force causes acceleration: if an object is in rest and you apply force to it, it start to move. Since the object was moving before, it has acceleration.

    to increase the acceleration of an object, you must increase the net force acting on it.

2. mass resists acceleration:
3. the same force applies to twice as much mass results in only half the acceleration. For a given force, the acceleration produced is intensely? Proportional to the mass.
4. inversely: two values change in opposite directions.
5. newton’s second law of motion: the acceleration produced by a net force on an object id directly proportional to the magnitude of the net force, is in the same directions the net force, and is inversely proportional to the mass of the object.
6. force=mass x acceleration
7. the net force: is the vector sum of all the individual forces operating on an object.
8. friction: is a force that acts on materials that are in contact with each other, and it always act in a direction to oppose motion.
9. force can occur in solids, liquids and gases both of which are called fluids
   10. air resistance: is the friction acting on something moving through air.
   11. pressure: the amount of force per unit of area. more precisely, when the force is perpendicular to the surface.
   12. pressure= force divided by area
   13. Newton: realized that force is not a thing in itself but part of a mutual action, an interaction, between one thing and another.
   14. newton’s third law of motion state: whenever on object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
   15. the action force and the other is called reaction force. they are equal in strength and opposite in direction.