1.

k)ぎh-20seconds,uwhat is theahan

Answer»

Case 1:Initial velocity = 36km/h=10 m/sFinal velocity = 72km/h= 20m/sTime taken = 5 sAcceleration =( 20 -10)/5= 10/5= 2m/s^2Case 2:Initial velocity = 72km/h= 20m/sFinal velocity = 0m/sAcceleration = (0-20)/20= -1m/s^2So, retardation = 1m/s^2



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