IT CONSISTS OF SOME OF THE CONCEPTS LIKE SPEED,DISPLACEMENT,VELOCITY AND ACCELERATION

2. The distanced travelled by an
object in unit time is called speed.

3.  Speed = Distance travelled
Time taken
 Unit of speed = unit of distance
unit of time
= metre
second

4. A body has uniform speed if it
travels equal distances in equal
intervals of time.

5. A body has non-uniform sped if it
travels unequal distances in equal
intervals of time.

6. The measure of the change of
position of an object in a
particular direction is known as
displacement.

7. Vector quantities are those which
need magnitude as well as direction.
 Eg :- displacement, velocity,
acceleration, etc.

8.  Scalar quantities are those which
need only magnitude.
Eg :- distance, speed, time, mass,
volume, etc.

9.  The displacement in unit time is called
velocity.
 Velocity = Displacement
Time
 Unit of velocity = unit of displacement
unit of time
 Unit = metre/second.

10. A body has a uniform velocity if
it travels in a straight line and
moves over equal distances in
equal intervals of time.

11. When a body does not cover
equal in equal intervals of time
the velocity is said to be non-uniform
velocity.

12.  The rate of change of velocity is known as
acceleration.
 Acceleration = change in velocity
Time
= Final velocity – Initial velocity
Time
 a = v – u
t
 Unit of acceleration = meter/(second)2

13.  In certain cases the final velocity
becomes less than the initial
velocity and results in negative
acceleration and is termed as
retardation.