Newtons Laws
Newtons Laws Of Motion:
Newtons Second Law
Newtons 3rd Law
Newtons First Law
Forces
Friction
Friction is the force that is exerted upon an object as it makes an effort to cross it. (The resistance an object feels when being rubbed against a surface or object)
Max Friction The maximum amount of applied force an object can take until it overcomes the frictional force and starts to move.
Kinetic Friction resists the motion of an already moving object. Always less than static friction.
Static Friction is the friction resisted upon an object before the object starts to move across the surface. Once the object starts to move Kinetic Friction is used.
F(frict-static) = μ(frict-static) * F(norm)
F(max) = μ(frict) * F(norm)
F(frict-kinetic) = μ(frict-kinetic) * F(norm)
Coefficient of Friction is a dimensionless number that represents the attraction between two surfaces
Friction acts in the opposite direction of the force being applied
Friction is sometimes necessary for everyday things like driving because the tires need it for traction to the road to help stay in control
A Force is a push or pull acting upon an object which results from an objects interaction with another object. (Vector Quantity)
Contact forces
Action-At-A-Distance-Forces
The Newton is the standard measuring unit for measuring forces.
Contact forces are the types of forces that result when interacting objects physically come in contact with each other.
Air resistance
Tension Force
Normal Force
Applied Force
A Force applied to an object by another object or a person.
The support force exerted on an object that is in contact with another stable object. For example A table standing on the earth.
A force that acts upon an object as it travels through the air, although it is often a negligible magnitude.
The force that is transmitted through a rope, cable, etc. when it is pulled tight by forces acting on opposite ends,
Action at a distance forces are forces that happen even when two objects are not physically touching each other.
Gravitational Force
Gravitational Forces are the force with what a massive object such as a planet attracts other objects towards itself.
Mass: The amount of matter contained within an object. ( measured in kilograms)
F Gravity=M*9.8
Weight: The force of gravity acting upon an object( Measured in Newtons)
Free Body Diagrams
A Vector diagram used in order to show all the forces acting upon an object.
Vector Diagrams use arrows to represent forces. The direction of an arrow represents the direction the force is acting and the size of an arrow represents the magnitude.
The object is usually represented by a box
An object at rest stays at rest and an object in motion stays in motion with the same speed unless acted upon by an unbalanced force
The acceleration of an object is produced by a net force and is directly proportional to the magnitude of the net force, and inversely proportional to the mass of an object.
For every action there is an equal and opposite reaction.
Inertia: Inertia is the tendency of an object to resist a change in its state of motion whether that be in acceleration or velocity.
Balanced and unbalanced forces:
Unbalanced Force: Forces that do not have a force of equal magnitude in the opposite direction to balance it.
Balanced forces have equal magnitude in opposite directions
State Of Motion: Determined by an objects velocity
Net Force: The Vector sum of all forces acting upon an object
Net Force Formula
Fnet = m * a or a = Fnet / m
As the force upon an object increases acceleration increases and vice verse, and as mass increases acceleration decreases and vice versa.
Net Force causes acceleration therefore if acceleration is present net force is present and vice versa