Answer : Retardation is only the negative acceleration. This body’s velocity might either rise or fall. The shift in velocity has been referred to as acceleration. Positive acceleration occurs when the body’s speed rises. Similarly, when velocity declines, the acceleration becomes negative.
The trains slow down when it approaches the terminal; in this scenario, the train starts retarding. Speed having the negative sign has been referred to as retardation. This negative acceleration number indicates when a body’s speed is decreasing.
The ratio of shift in velocity with relation to time has been defined as acceleration. This is represented by the symbol an as well as is expressed as an Equals Change throughout velocity/Time required.
Let
t represents time spent
u denotes the starting velocity
v denotes the final velocity
Consequently
v = u + at
In the situation of (v<u), you might receive the negative acceleration number, which is referred to as retardation.