Save
Physics CAIE
AS levels
Kinematics
Save
Share
Learn
Content
Leaderboard
Learn
Created by
Thenuli Vithanage
Visit profile
Cards (15)
Distance is the
total length
moved
irrespective
of
direction
Displacement is the
shortest
point from one point to another in a particular
direction
Speed is the
rate of change of distance
per
unit time
Velocity is the
rate of change of displacement per unit time
Average speed/velocity is the
average rate of change of distance/displacement
over a
unit period of time
Instantaneous velocity/speed is the
velocity
/
speed
of an
object
at any
particular instant
of
time
Acceleration is the
rate of
change of velocity
per
unit time
Acceleration of free fall is the
acceleration
produced
when an object
falls
under the influence of the
gravitational force
of the
earth
alone
The equation for acceleration due to gravity is g =
-9.81 m/s^2
Projectile motion is the
motion
of an object
thrown
or
projected
into the
air
, subjected only to the
acceleration
of
gravity
Equations of motion can only be applied for,
motion in
straight line
constant acceleration
Determining
acceleration
of
free fall
a
steel ball
is held on an
electromagnet
when the
electromagnet
is
switched off
, the ball interrupts a
light beam
and a
timer starts
as the ball
falls
, it
interrupts
a
second light beam
and the
timer stops
vertical distance
h is plotted against
t squared
Projectile motion is when the
uniform velocity
acts along the
horizontal direction
and
constant acceleration
acts in a
perpendicular direction
In projectile motion,
without
air resistance
, the horizontal direction is
constant
, and the vertical direction
increases at
a
constant
rate
with air resistance, the horizontal direction
decreases
to
0
, and vertical direction
increases
to a
constant
value
Terminal velocity
,
for a body in
free fall
, the only force acting on it is its
weight
and its
acceleration
drag
force
increases
as the body
accelerates
therefore, the
acceleration decreases
when the drag
force
is
equal
to the
gravitational pull
on the body, the body will no longer
accelerate
and will fall at a
constant velocity
this is the
maximum velocity
that the object can have an is called the
terminal velocity