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and penetratesarest. Find the deceleration.18.) A particle starting from rest moves wiacceleration. If it takes 5 0 s to reach the speed 18.0km/h find (the average velocity during this period,and (b) the distance travelled by the particle during thisperiod.19. A driver takes 0 20 s to apply the brakes after he seesit rhis is called the reaction time of the

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