The picture below shows a person swinging a yo-yo in a circle. Which vector shows the velocity of the yo-yo at this moment? A. B
B. A
C. C
D. D

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)