The branch of mechanics which deals with the study of motion of the object without considering the cause
of motion is called kinematics.

Some important terms:

Distance:
The length of the path travelled by an object is called distance. It is a scalar quantity. Its S.I unit
is meter(m) and C.G.S unit is (cm). Its dimensional formula
is [L]

Displacement:
The shortest distance between initial position and final position of an object is called displacement.
It is a vector quantity. Its S.I unit is meter(m) and
C.G.S unit is (cm). Its dimensional formula is [L]. The relation between distance and displacement is
Distance
Displacement

Speed:
The distance travelled by an object per unit time is called speed. i.e
It is scalar quantity. Its S.I unit is m/s and cgs unit is cm s^{-1}. Its dimensional formula
is [M^{0} L T^{-1}]

Velocity:
The rate of change of displacement of an object is called velocity. i.e. velocity = (displacement) /
Time It is a vector quantity =. Its S.I unit is m/s and
CGS unit is cm s^{-1}. Its dimensional formula is [M^{0}LT^{-1}]

Uniform Velocity:
If there is equal displacement of an object in equal interval of time then the object is moving with
uniform velocity.

Non- Uniform Velocity:
If the object is moving with variable velocity (either change in magnitude or change in direction or
both) then the object is moving with non- uniform
velocity.

Average Velocity:
The ratio of displacement (change in position) and a time taken for displacement is called average
velocity. i.e. Average velocity =
V_{av} =
Also, V_{av} = (u+v) / 2

Instantenous Velocity: The rate of change of displacement of a object is called instantenous velocity
or the velocity of an object at particular instant is called instantenous velocity . The velocity
measured by the speedometer in vehicle is instentenous velocity. V = ds / dt

Acceleration:
The rate of change of velocity is called Acceleration. i.e. Acceleration = (change in velocity) /
Time taken It is a vector quantity. Its SI unit is
ms
^{-1} and CGS unit cm s^{-2}. Its dimensional formula is [LT^{-2}]

also,
a = (v - u) / t

Special Cases

i) If v > u (Accelerating) a will be positive (speeding up)

ii) If v = u (zero
accelerating) a will be zero (constent speed)

iii) If v
< u (De accelerating )
a will be negative (speeding down)

Uniform Acceleration: If there is equal change in velocity of object in
equal interval of time then the object is moving with uniform acceleration.

Non-Uniform Acceleration: If object is moving with variable
acceleration (either change in magnitude or change in direction or both ) , then the object is moving
with non - uniform acceleration
.

Average Acceleration: The ration of change in velocity and time
interval for change in velocity is called average acceleration.

i.e. a_{av} = (v_{2} - v_{1}) / (t_{2} - t_{1})

Instantenous Aceleration:
The rate of change of velocity of an object with respect to time is called instantenous acceleration.
a = dv / dt

In case of any problem ask me in
qustions section!!!!