Question

list various types of acceleration ?

what do you mean by retardation ?

A train moving with velocity of 54km/h is accelerated so that its velocity becomes 72km/h in 15 second . find its acceleration of the train.
​

Answer 1

Answer:

mark me as brain least you got it will send you got it to work I

Answer 2

Answer:

there are two types of acceleration: average and instantaneous

retardation means decrease in acceleration or negative acceleration

initial velocity(u)=54km/h=54*5/18= 15m/s

final velocity(v)=72km/h=20m/s

time(t)=15 seconds

acceleration(a)=v-u/t

                      =  20-15/15

                    a  =5/15=1/3m/s^2    

Explanation: