A car moving at 27 m/s [fwd] strikes the back end of a stationary disabled rock truck bringing the car to rest in a time of 0.7 seconds. If the 65 Kg person inside the vehicle was wearing a seatbelt, then calculate the force that the belt would exert on the person.

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