A car starts from rest and accelerates for 10s to gain a velocity of 20m/s. It then runs at constant speed and finally brought to rest in 40m with a constant retardation. If the total distance covered is 640 m, find the value of acceleration, retardation and total time taken.
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Answer:
acceleration=-2 m/s square
retardation=-20 m/s
time=44 sec
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