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KINEMATICS - Coggle Diagram
KINEMATICS
Uniform Acceleration
is
when the acceleration (a) is constant
relies on
SUVAT Equations of Motion
Crucially
these equations are only valid provided that the motion is uniformly accelerated
are
v = u + at
s = ut + 1/2at^2
v^2 = u^2 + 2as
key quantities
Acceleration (a)
type
vector
definition
rate of change of velocity
the opposite of
Deceleration
is
acceleration in the opposite direction to velocity.
Velocity (v)
Type
Vector
Calculation
Velocity = displacement / time
Speed (v)
Type
Scalar
calculation
Speed= Time/Distance
Displacement (s or x)
type
vector
definition
Change in position, including direction.
Distance
type
Scalar
definition
Total path length covered.
Motion Graphs
includes
Velocity-Time (v−t) Graph
where
gradient represent acceleration
area under curve
represent
displacement
Acceleration-Time (a−t) Graph
where
Area under curve
represent
Change in Velocity (Δv)
Displacement-Time (s−t) Graph
where
gradient represent velocity
Special Scenarios of Motion
Terminal Velocity
This state is reached when
the drag (air resistance) force eventually balances the object's weight.
This results in a
resultant force of zero
leading to
zero acceleration
therefore
a maximum constant velocity
Projectile Motion
occurs when
motion is two-dimensional.
analyzed by
separating the motion into independent horizontal and vertical components.
Specifically
the horizontal motion has constant velocity , while the vertical motion has constant acceleration
Free Fall
refers to
motion under gravity, assuming air resistance is negligible.
results in a
constant acceleration