(13%) Problem 3: A student begins at rest and then walks north at a speed of $v_1$ = 0.75 m/s. The student then turns south and walks at a speed of $v_2$ = 0.51 m/s. Take north to be the positive direction. Refer to the figure.
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?33% Part (a) What is the student's overall average velocity $v_{avg}$, in meters per second, for the full trip assuming the student spent equal times at speeds $v_1$ and $v_2$?
?33% Part (b) If the student travels in the stated directions for 30.0 s at speed $v_1$ and 20.0 s at speed $v_2$, what is the net displacement, in meters, during the trip?
?33% Part (c) If it takes the student 1.2 s to reach the speed $v_1$, from rest, what is the magnitude, in meters per squared second, of the student's average acceleration during that time?