Motion
If a body changes its position with respect to its surrounding it is said to be in motion
Rest
If a body does not changes its position with respect to its surrounding it is said to be in rest .
Reference Point
The point about which we study the motion of an object is called reference point.
Uniform Motion
If a body travels equal distance in equal interval of time, the body is said to be in uniform motion
Non-Uniform Motion
Speed
The rate of change of distance per unit time is called speed.
Speed=Distance travelled
Time taken
= m
s
= m/s
Therefore, SI Unit of speed is m/s
Distance Travelled
The length of a path travelled by a moving body in any direction is said to be in distance travelled.Its is a scalar quantity and it has magnitude (having unit) but no direction.It is measured in meter(m) in SI Units.
Displacement
The shortest distance between two points is called displacement.It iis a vector quantity.In SI System Unit of displacement is meter(m).The shortest is always the straight line.
If a body changes its position with respect to its surrounding it is said to be in motion
Rest
If a body does not changes its position with respect to its surrounding it is said to be in rest .
Reference Point
The point about which we study the motion of an object is called reference point.
Uniform Motion
If a body travels equal distance in equal interval of time, the body is said to be in uniform motion
Non-Uniform Motion
If a doesnot body travels equal distance in equal interval of time, the body is said to be in non- uniform motion.
Speed
The rate of change of distance per unit time is called speed.
Speed=Distance travelled
Time taken
= m
s
= m/s
Therefore, SI Unit of speed is m/s
Velocity
The rate of change of displacement per unit time is called speed.
Velocity=Dislacement
Time taken
= m
s
= m/s
Therefore, SI Unit of velocity is m/s
Distance Travelled
The length of a path travelled by a moving body in any direction is said to be in distance travelled.Its is a scalar quantity and it has magnitude (having unit) but no direction.It is measured in meter(m) in SI Units.
Displacement
The shortest distance between two points is called displacement.It iis a vector quantity.In SI System Unit of displacement is meter(m).The shortest is always the straight line.