Question

Diffentiate between acceleration and retardation

Answer 1

Acceleration of a body is defined as the rate of change of its velocity with time.Velocity of the body increases with time.
i.e Acceleration = Change in velocity / Time taken for change

Retardation means negative acceleration. If the velocity of a body decreases,the acceleration is negative.
Example: The acceleration of a body is -5 m/s​2. then we can say that the retardation of the body is 5 m/s​2.

Answer 2

acceleration ----The rate of change in velocity with time.
retardation -----The decreament in velocity with time is called retardation. also known as negative acceleration