The gravitron is a ride that rotates around a central axis until it reaches a certain velocity and the riders are pinned to the walls. once this occurs, the floor is lowered until the riders are suspended above the floor. the gravitron has a radius of 3.00 meters and reaches a speed of 15.0 m/s. dalnita has a mass of 55.0 kg. what is her angular velocity in radians per second?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.