Consider a rotating object. On that object, select a single point that rotates. How does the angular velocity vector of that point compare to the linear velocity vector at that point

 v = w r

Explanation:

The linear and angular variables are related, specifically the linear velocity is equal to the angular velocity multiplied vectorially by the radius

          v = w x r

in general if the radius and the angular velocity are perpendicular

          sin  90 = 1

          v = w r

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?