What's the time it takes a car to attain the speed of 30 m/s when accelerating from rest at 2 m/s (squared) A- 15 s
B- 2 s
C- 60 s
D- 30 s
E- none

If a simple machine reduces the strength of a force, what must be increased?

In which of the following is positive work done by a person on a suitcase

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