Question
What do you mean by the term retardation? Give two examples of such a motion.
Solution
When the velocity of a body decreases, its acceleration is negative. Negative acceleration is called ‘retardation’ or ‘deceleration’.
For example, when a stone is thrown upwards, it is under retardation.
Similarly, when a bus approaches a bus-stop, its motion gets retarded.
In both the cases mentioned above the acceleration decreases.
