Question

what is acceleration and deceleration

Answer 1

Hello


Acceleration:-In physics, acceleration is the rate of change of velocity of an object with respect to time. 

deceleration:-Deceleration is the opposite of acceleration. It is the rate at which an object slows down. 

thankyou

Answer 2

acceleration refers to rate of change of velocity of an object with respect to time
eg: is the speed of car increase or decrease is known as acceleration
the negative acceleration is known as the retardation
deceleration: to decrease velocity
eg: anytime you are in a vehicle you are supposed to feel that you are moving forward


both acceleration and deceleration is measured in terms of gravitational acceleration