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Question: problem 1 a particle travels rectilinearly a certain distance s...

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Problem 1: A particle travels rectilinearly a certain distance s. The particle travels half the distance () at a velocity vi It travels the remaining distance (ata velocity v for half the time and a velocity v3 for the other half of the time. What is the total time taken to travel the distance s? Problem 2: A car starts at rest and moves along a perfectly straight highway with an acceleration of a1 10 m/s2 for a certain amount of time t. It then moves with constant speed (zero acceleration) for a time t2 and finally decelerates with an acceleration a2--10 m/s2 for a time t3 until it comes to a complete stop. The total time of motion is t1 t2 t3 25 s. The total distance travelled by the car is 1 km. Find t2. Hints: (i) Recognize that each segment of the journey is at constant acceleration! (ii) What is the relationship between the quantities t,, t2, and t3? Use this to help simplify the set of equations that you obtain during the solution process.

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