The particle shown in Figure , moves along x with a constant acceleration of -4m/s2 . As it passes the origin, moving in the +direction of x, its velocity is 20 m/s. In this problem, time t is measured from the moment the particle is first at the origin. (a) At what distance x’ and time t’ does v = 0 ? (b) At what time is the particle at x = +15 m, and what is its velocity at this point? (c) What is the velocity of the particle at x = +25 m? at x = -25 m?

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