Some objects in our surrounding are moving with respect to the stationary
ones. Based on that object or body in our surroundings, our environment
can be classified as :-
• Stationary Objects ( in rest )
• Moving Objects ( in motion )
A body is said to be in motion
when it’s position changes
continuously with respect to
reference point (stationary
• E.g.:- hand of the clock are in
Reference point :-
• When a car moves in front of a
• With respect to the trees car is
• Trees – reference point
• Gives only magnitude
• Give both magnitude and direction
Vector and Scalar
A body travels in uniform motion when it travels equal distance in equal
interval of time.
A body travels in Non uniform motion when it travels unequal distance in
equal interval of time.
Uniform and Non Uniform motion
Speed:- distance travelled by a body per unit time ……….
speed = distance/time
Speed is scalar
Speedometer and Odometer are used to measure speed of an object
Average speed :- The average speed of a body is the total distance
travelled by the total time taken.
Average Speed = Total distance traveled / Total time taken
Average and Uniform Speed
Velocity :- distance travelled by a body per unit time in a given direction……
VELOCITY = displacement / time
Velocity is vector.
Direction of a body is as displacement at the body.