. Flashcards
is the resistance an object has to a change in its state of motion.
Inertia
A set of time-space coordinate system that is stationary or with constant velocity.
Inertial Reference Frame
An object at rest remains at rest, an object in motion continues in motion with constant velocity unless the object experiences a net external force.
Law of Inertia
The acceleration of an object is 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 force simultaneously exerted on object 2 by object 1, and these two forces are apposite in directions.
Law of Interaction
• A push or pull upon an object resulting from the object’s interaction with another object.
• Measured in units of Newton (N).
Forces
Two interacting objects are physically in contact with each other
Contact
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
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
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.
> 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
• Force with which the earth, moon, or other massive body attracts an object towards itself.
• Equal to the weight of the object as given by the equation:
Fg = mg
Gravitational Force
