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Answer to Question #36787 in Mechanics | Relativity for dania sharqawi

Question #36787
a truck on a straight road start from rest accelerating at 2 m/s^2 until it reaches a speed of 20 m/s then the truck travels for 20 s at a constant speed until the brakes are applied stopping the truck in a uniform manner in an additional 5 s . how long is the truck in motion and what is the average velocity of the truck for the motion described ?
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