LESSON3: forces and newton's law Flashcards
is the resistance an object has to a change in its state of motion
inertia
the greater the mass,
the greater inertia an object has
the branch of mechanics concerned with the motion of bodies under the action of forces
dynamics
a set of time-space coordinate system that is stationary or with constant velocity
inertial reference frame
newton’s law of motion
1.law of inertia
2.law of acceleration
3.law of interaction
an object at rest remains at rest, an object in motion continues in motion with constant velocity unless the object experienced a net external force
law of inertia
the acceleration of an object’s directly proportional to the net external force acting on the object and inversely proportional to the object’s mass
law of acceleration
If two objects interact, the magnitude of force exerted on object 1 by object 2 is equal to the magnitude of the forceO simultaneously exerted on object 2 by object 1, and these two forces are pposite in directions.
law of interaction
A push or pull upon an object resulting from the object’s interaction with another object.
forces
Measured in units of Newton (N).
forces
type of forces
1.contact
2.non-contact
Two interacting objects are physically in contact with each other
contact
examples of contact force
Tensional, Frictional, Normal, Applied, Air Resitance
Two interacting objects are not in physical contact with each other, but are able to exert a push or pull despite the physical separation.
non-contact
Example example of non-contact force
Gravitational, Magnetic, Electric.
Force which is applied to an object by another object or by a person.
applied forces
Force which is transmitted through a string, rope or wire when it is pulled tight by forces acting at each end.
tensional forces
Support force exerted upon an object which is in contact with another stable object
normal force
Force exerted by a surface as an object moves across it or makes an effort to move across it.
friction force
Opposes the motion of the object.
friction force
Special type of frictional force which acts upon objects as they travel through the air.
air resistance
Depends on surface area of object
air resistance
Force with which the earth, moon, or other massive body attracts an object towards itself.
gravitational force
Equal to the weight of the object as given by the equation: Fg = mg
gravitational force
Amount of matter that is contained by the object in units of kilograms (kg)
mass
Force of gravity acting upon an object in units of newton (N).
weight
