KINEMATICS Flashcards
vector
as a physical quantity that has magnitude and direction
scalar quantity
as a physical quantity that has magnitude only
resultant vector
as the single vector which has the same effect as the original vectors acting together.
distance
the length of the path travelled (scalar)
displacement
as a change in position (vector)
speed
as the rate of change of distance (scalar)
velocity
the rate of change of displacement (vector)
acceleration
the rate of change of velocity
weight
as the gravitational force the earth exerts on any object on or near its surface
normal force
as the perpendicular force exerted by a surface on an object in contact with it.
newtons first law
an object continues in a state of rest or uniform velocity unless it is acted upon by a net or resultant force.
inertia
as the property of an object that causes it to resist a change in its state of rest or uniform motion.
newtons second law
when a net force is applied to an object of mass, it accelerates in the direction of the net force. the acceleration, is directly proportional to the net force and inversely proportional to the mass.
newtons third law
when object A exerts a force on object
B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A.
