CT3-5.The position vector of a particle moving with constant velocity is shown below at two different times, an earlier time t1 and a later time t2. Which arrow shows the direction of the velocity vector? Answer: Blue, to the right. The direction of velocity is the same as the direction of "delta-R":rV=trr . There's an even easier way to see this: The "position vector" gives the position of the particle with respect to the origin. Since the particle starts at the tip of the R1 vector and ends on the tip of the R2 vector, the particle must be moving from left to right.Pink Blue Green Yellow Purple: None of these! R1 R2CT3-6.The velocity vector of a particle moving with constant acceleration is shown below at twodifferent times, an earlier time t1 and a later time t2. What is the direction of the acceleration vector? Answer: Green, acceleration is down, since vr is down.Pink Blue Green Yellow Purple: None of these! v1 v2 v v1 v2CT3-7 The vectors A, B, and Cr rr are shown. The vector sum of these three vectors is S = A + B + Cr r rrWhat is the value of Sx, the x-component of Sr?Pink: +2Yellow: -4Green: -2Blue: +3Purple: None of theseAnswer: None of these.x x x xS A +B +C 3 3 3 3 What is Sy? Answer: -4, y y y yS A +B +C 1 3 0 4 A C BCT3-8 Which one equation below makes no sense?Yellow: �A jurGreen: � � �B 3i j 5j urPink: � �C 3i 4 j urBlue: �C A i ur urPurple: All equations above are OK.Answer: All the equations are
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