3. Three friends run a race. The graph below describes their motion. a. Who runs at the slowest speed?

b. Who passes Aiesha first?

c. Who travels the farthest after 5 seconds?

d. Estimate the velocity of Cecilia (show your work)

e. Estimate the velocity of Michelle (show your work)

f. Write an equation for the position of Alesha.

8. What is the acceleration of Michelle?

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c