Chapter 4.1-4.2 Test Flashcards
System
Object or objects of interest that can interact with each other and the external world
Force
A push or a pull exerted on an object; vector; contact or field
Free body diagram
A physical model that represents the forces acting on a system
Net force
Vector sum of all the forces on an object
The relationship between force and acceleration is
Linear
A=
Fnet/m
Fnet=
Ma
Newton’s second law
The acceleration of an object is proportional to the net force and inversely proportional to the mass of the object being accelerated
Newton’s first law
An object at rest will stay at rest and a moving object will continue moving in a straight line with constant speed if the net force acting on an object is zero
Inertia
The tendency of an object to resist changes in velocity
Equilibrium
The condition in which the net force of an object is zero
Net force is
Something that disturbs state of equilibrium
Weight
The gravitational force experienced by an object on an object
Gravitational field
A vector quantity that relates the mass of an object to the gravitational force it experiences at a given location; Fg=mg
Apparent weight
The support force acting on an object
Weightlessness
An objects apparent weight of zero that results when there are no contact forces supporting the object
Drag force
He force exerted by a fluid on an object that opposes the objects motion through the fluid
Terminal velocity
The constant velocity of an object that is reached when the drag force is equal to the force of gravity
Newton’s third law
All forces come in pairs and that the two forces in a pair act on different objects , are equal in strength and opposite in direction
Accelerations are result of
Unbalanced force acting on an object
Force causes what to change and I’m return what to change
Velocity / acceleration
