A starts its journey from rest to a velocity of 50ms‐1 for 40s. it continues with this constant velocity for 30 mins. Due to the same climatic circumstances he suddenly sees a wall and the deiver applies his brakes and it took 30s to come to rest. the mass of yhe car and the driver is 100kg. calculate the : (i) acceleration for the first 40s ,(ii) acceleration for the first 30s ,(iii) acceleration for the last 30s .Hence calculate the resultant force in the 3 situations from part(i)​

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