exam Flashcards
(21 cards)
Acceleration
the are of change of velocity
average velocity
the total displacement divided by the time interval during which the displacement
displacement
the change in position of an object
frame of reference
a coordinate system for specifying the precise location of objects in space
free fall
motion of an object falling with a constant acceleration
components of a vector
the projections of a vector along the axes of a coordinate system
projectile motion
free fall with an initial horizontal velocity
Resultant
a vector representing the sum of two or more vectors
scalar
a physical quantity that has only a magnitude but no direction
vector
a physical quantity that has both a magnitude and a direction
action reaction pair
a pair of simultaneous but opposite forces resulting from the interaction of two objects
coefficient of friction
the ratio of the force of friction to the normal force acting between two objects
contact force
force that arises from the physical contact of two objects
equilibrium
the state in which there is no change in a body’s motion
field force
force that can exist between objects, ben in the absence of physical contact between the objects
inertia
the tendency of an object t maintain its state of motion
kinetic friction
the resistive force that opposes the relative motion of two contacting surfaces that are moving past one another
net external force/ resultant
the total force resulting from a combination of external forces on an object, sometimes clued the resultant force
normal force
a force exerted by one object on another force in a direction perpendicular to the surface of contact
static friction
the resistive force that opposes the relative motion of two contacting surfaces that are at rest with respect to one another
weight
the magnitude of the force of gravity acting on an object
