Kinematics ⇒ A subset of kinematics that is particular to motion in a straight line is called linear kinematics.
Distance ⇒ Distance refer to a physical length. When body moves from one location to another, the length of the path that the body follow is the distance, e.g. when a runner completes 2 laps around a 400 m track, the distance that the runner has covered is equal to (400 + 400) 800 m.
Displacement ⇒ It is change in position displacement is the shortest distance from the initial position to the final position of a point. It is measured in a straight line e.g. in the completion of a lap around the 400 m track, the displacement is zero because the starting and finishing positions are the same.
Speed ⇒ Speed is the rate at which an object covers distance. It is defined as the distance covered, divided by the time taken to cover it.
\(\bar s=\frac{1}{\triangle t}\)
l = length of path
t = time
Δ = delta (or) change in time
\(\bar s\) = average speed
Velocity ⇒ Velocity is the change in position or the displacement that occurs during a given period of time.
\(v=\frac{d}{\triangle t}\)
v = velocity
d = displacement
t = time
Δ = delta (or) change in time
Acceleration ⇒ The rate of change of velocity is called acceleration.
May be positive may be negative.
a = v/t or a d/t2 = m/sec2 unit
Positive acceleration : the final velocity (v2) will be greater than initial velocity (v1) [deacceleration]
Unit are meters/second2
