Question #578

1) Driving along a crowded freeway, you notice that it takes a time to go from one mile marker to the next. When you increase your speed by 7.4 , the time to go one mile decreases by 13 s. what was your initiual speed? 2) Starting from rest, a boat increases its speed to 4.32 with constant acceleration. What is the boat’s average speed? If it takes the boat 4.62 to reach this speed, how far has it traveled? 3) As a train accelerates away from a station, it reaches a speed of 4.5 in 5.4 . If the train's acceleration remains constant, what is its speed after an additional 6.0 has elapsed? 4) The position of a particle as a function of time is given by Find the average velocity of the particle from to . And Find the average velocity from to .

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