Kinematics is study of motion
DISTANCE(path length): it is defined as covering of actual path of body from initial point to finish point.
It is scalar quantity.
Distance can't zero(it's magnitude can be zero).
DISPLACEMENT: it is defined as vector distance (shortest distance) from final point to initial point of an object.
It is vector quantity.
Scalar quantity: it has only magnitude and followed simple arithmetic mathematics operation.
Vector quantity: it has magnitude with direction and followed vector law.
Note:Distance =Displacement,if body travel in 1-D dimension at one direction (+ve or-ve).
*Motion along 1-D is also called rectilinear motion.
SPEED: it is defined as rate of coverage of distance.
S=D/T
VELOCITY: It is defined as rate of change in Displacement.
V=d/t
a=∆v/t
*Deceleration is decreasing rate of velocity (-ve of acceleration)
Average: it is defined as rate of change of measurement (displacement, acceleration, velocity etc) of certain interval of time.(it is for comparing larger time)
Instantaneous: it is defined as change of fram in instead time or for very short interval of time.(lim to zero).
Relative term : it is relationship between two variables of measurement.
Uniform: if object cover equal measurement in equal interval of time then it indicates that body is in uniform.(motion, acceleration, velocity)
Non- Uniform: if object cover variables measurement in equal interval of time to time.
What is equation
Equation is relationship between two or more variables.
