A car 4m long moving at a velocity of 25m/s was beside a lorry 20m long with a velocity 19mls. At t = 0,

the distance between them was 10m. How long will it take the car to overtake the lorry (a) 9s (b) 5s (c) 3s

(d) 2s

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