Ephys ch 2 Flashcards
(23 cards)
is a progressive change of position of a body
motion
change in motion is the result of an
applied force
is typically described in terms of velocity, acceleration, displacement, and time
motion
1st law of newton
law of inertia
a body which does not move is said to be
at rest
is the velocity of a body is the same at every moment during which the motion takes place
uniform motion
refers to the motion decreasing
retarded motion
is the branch of science that deals only with the motions of bodies without references to the forces that cause them
kinematics
branch of mechanics concerned with the motions of objects without being concerned with the forces that cause the motion
kinematics
is the time-rate of change of distance and is expressed as distance divided by time
velocity
the time-rate of change of velocity and is expressed as velocity divided by time
acceleration
is the position or body relative to another known point
displacement
vector measure of the interval between two locations measured along the shortest path connecting them
displacement
is a scalar measure of the interval between two locations
distance
refers to moving body or particles in a straight line
rectilinear motion
is the motion of rigid body about a fixed point
rotational motion
describes how fast it is turning about an axis
angular velocity
change in angular velocity divided by time elapsed
angular acceleration
is the motion along a curved path
curvilinear motion
is the ideal falling motion of a body acted upon by the pull of the earth’s gravitational field
free fall
is an object which is falling under the sole influence of gravity
free falling object
the velocity of a particle at a particular instant of time
instantaneous velocity
absolute value of the instantaneous velocity
instantaneous speed
