Physics: Forces and Motion

Study Notes

A force is a push or pull that causes an object to change its motion or shape.
It is a vector quantity, meaning it has both magnitude (amount of force) and direction.

Contact Forces:
- Frictional force: opposing motion between two surfaces in contact
- Normal force: force exerted by a surface on an object that is in contact with it
- Tension force: force exerted by a stretched string or wire
- Air resistance force: force opposing motion through the air
Non-Contact Forces:
- Gravitational force: force of attraction between two objects with mass
- Electromagnetic force: force between charged particles or magnets
- Nuclear force: force that holds protons and neutrons together in an atom

Magnitude: the amount of force applied, measured in units such as Newtons (N)
Direction: the direction in which the force is applied, can be described in terms of angles or coordinates
Point of Application: the point at which the force is applied to an object
Resultant Force: the single force that results from the combination of multiple forces acting on an object

First Law: an object at rest will remain at rest, and an object in motion will continue to move with a constant velocity, unless acted upon by an external force
Second Law: the force applied to an object is equal to the mass of the object multiplied by its acceleration (F = ma)
Third Law: for every action, there is an equal and opposite reaction force

Force is a push or pull that causes an object to change its motion or shape.
It is a vector quantity, meaning it has both magnitude (amount of force) and direction.

Contact Forces:
- Frictional force opposes motion between two surfaces in contact.
- Normal force is exerted by a surface on an object in contact with it.
- Tension force is exerted by a stretched string or wire.
- Air resistance force opposes motion through the air.
Non-Contact Forces:
- Gravitational force is the force of attraction between two objects with mass.
- Electromagnetic force is the force between charged particles or magnets.
- Nuclear force holds protons and neutrons together in an atom.

Magnitude is the amount of force applied, measured in units such as Newtons (N).
Direction is the direction in which the force is applied, described in terms of angles or coordinates.
Point of Application is the point at which the force is applied to an object.
Resultant Force is the single force resulting from the combination of multiple forces acting on an object.

First Law: an object at rest remains at rest, and an object in motion continues to move with a constant velocity, unless acted upon by an external force.
Second Law: force applied to an object equals the mass of the object multiplied by its acceleration (F = ma).
Third Law: for every action, there is an equal and opposite reaction force.